How to decipher the serial number of your Audemars Piguet watch caliber? How to determine the year of manufacture of your Audemars Piguet caliber? Here are some tips to uncover the origin of your watch, the serial numbers, and references of certain parts, ensuring they are no longer a mystery. Identifying the year of your Audemars Piguet watch is not an easy task compared to other manufacturers. However, we have gathered official archives to provide these tables, allowing you to date the production period of your watch based on the caliber serial number.
The calibers were often shared among several references, such as the Royal Oak, but not exclusively. Please note that only an extract from the archives provided by the brand can confirm the year your watch was sold (note: it is common to observe slight discrepancies between the manufacturing date and the sale date).
Where to find the serial number of your Audemars Piguet caliber
The serial number of your caliber is directly stamped on the plate of the caliber. An expert watchmaker can assist you in identifying it.
Find your serial number - Identify the years corresponding to serial numbers - How to date a Royal Oak ref. 5402ST by the letter engraved on the back of the watch
How to find the year corresponding to your serial number
If your watch bears the number 211640, its production date corresponds to 1979, within the range "211501-211900," corresponding to 5402 models produced that year.
Audemars Piguet Serial Numbers by Year
1970 | 1971 | 1972 | 1973 | 1974 | 1975 | 1976 | 1977 | 1978 | 1979 | 1980 | 1981 | 1982 | 1983 | 1984 | 1985 | 1986 | 1987 | 1988 | 1989
- 1970 -
| Watch Reference | Caliber Reference | Serial Number |
|---|
| Hours, Minutes, Small Seconds |
2001 |
130901-131100 |
| 111801-112000 |
| 120501-120800 |
| 124581-124680 |
| 5271, 5272, 5273, 5274, 5279, 5285, 5287, 5302, 5307, 5384 |
2120 |
112501-113000 |
| 116701-117200 |
| 122881-123080 |
| 125601-125700 |
| Hours, Minutes |
2003 |
114001-114900 |
| 118201-118700 |
| 120001-120200 |
| 120826-120875 |
| Lady |
2050 |
116001-116300 |
| 117201-118200 |
| 123281-123380 |
| 123781-123880 |
| Lady |
2430 |
116401-116500 |
| NA |
2002 |
120201-120400 |
| Royal Oak 5402 |
2121 |
120801-120812 |
| 120881-121780 |
| 127001-127100 |
| NA |
13"77 |
120821-120825 |
| NA |
8/9 JN |
125081-125180 |
| NA |
JSMCCRVQ |
120876-120878 |
- 1971 -
| Watch Reference | Caliber Reference | Serial Number |
|---|
| Hours, Minutes, Small Seconds |
2001 |
131101-131400 |
| 124481-124580 |
| 124681-125080 |
| Hours, Minutes |
2003 |
118701-120000 |
| 128901-129300 |
| Hours, Minutes, Seconds |
2002 |
120401-120500 |
| Royal Oak 5402 |
2121 |
121781-122880 |
| 126901-127000 |
| 127101-127200 |
| 5271, 5272, 5273, 5274, 5279, 5285, 5287, 5302, 5307, 5384 |
2120 |
123081-123280 |
| 125301-125600 |
| 125701-126100 |
| Lady |
2050 |
123381-123780 |
| 123881-124080 |
| Lady |
2430 |
126301-126600 |
| 126601-126800 |
| NA |
5017 |
125181-125212 |
| NA |
JSMCCRVQ |
120879-120880 |
- 1972 -
| Watch Reference | Caliber Reference | Serial Number |
|---|
| Hours, Minutes |
2003 |
129906-130900 |
| Hours, Minutes, Small Seconds |
2001 |
131401-131500 |
| Lady |
2050 |
131501-131600 |
| NA |
2001 |
132501-133100 |
| 5271, 5272, 5273, 5274, 5279, 5285, 5287, 5302, 5307, 5384 |
2120 |
133101-133600 |
| Hours, Minutes, Seconds |
2002 |
134201-134400 |
| NA |
5017 |
134401-134500 |
| Hours, Minutes |
2003 |
134501-134600 |
- 1973 -
| Watch Reference | Caliber Reference | Serial Number |
|---|
| Lady |
2050 |
131601-132500 |
| Hours, Minutes |
2003 |
136101-137200 |
| Hours, Minutes, Small Seconds |
2001 |
137201-138100 |
| 5271, 5272, 5273, 5274, 5279, 5285, 5287, 5302, 5307, 5384 |
2120 |
138101-138600 |
| Royal Oak 5402 |
2121 |
138601-139100 |
| Hours, Minutes, Small Seconds |
2001 |
139401-141100 |
| Royal Oak 5402 |
2121 |
141101-142700 |
| Hours, Minutes, Seconds |
2002 |
142701-142800 |
| Hours, Minutes, Small Seconds |
2001 |
142801-143300 |
| Hours, Minutes, Seconds |
2002 |
144101-144200 |
| Lady |
2050 |
144201-144300 |
| Royal Oak 5402 |
2121 |
145301-145500 |
| 5271, 5272, 5273, 5274, 5279, 5285, 5287, 5302, 5307, 5384 |
2120 |
147901-148000 |
| Hours, Minutes |
2003 |
145101-154200 |
| Royal Oak 5402 |
2121 |
128401-128900 |
- 1974 -
| Watch Reference | Caliber Reference | Serial Number |
|---|
| Hours, Minutes, Small Seconds |
2001 |
143301-144100 |
| Lady |
2050 |
144301-145300 |
| Royal Oak 5402 |
2121 |
145501-147900 |
| 5271, 5272, 5273, 5274, 5279, 5285, 5287, 5302, 5307, 5384 |
2120 |
148001-149400 |
| Hours, Minutes, Small Seconds |
2001 |
149401-151300 |
| 6001 Quartz |
2510 |
153501-153565 |
| 153581-153600 |
| NA |
5017 |
154001-154100 |
| Hours, Minutes |
2003 |
154201-156200 |
| 5271, 5272, 5273, 5274, 5279, 5285, 5287, 5302, 5307, 5384 |
2120 |
156201-156700 |
| Royal Oak 5402 |
2121 |
158001-158100 |
| Royal Oak 5402 |
2121 |
159301-159600 |
| Hours, Minutes |
2003 |
160301-161000 |
| Hours, Minutes |
5017 |
164401-164500 |
| Lady |
2050 |
164501-164900 |
- 1975 -
| Watch Reference | Caliber Reference | Serial Number |
|---|
| Hours, Minutes, Small Seconds |
2001 |
151301-153300 |
| Hours, Minutes, Seconds |
2002 |
153301-153500 |
| 6001 Quartz |
2510 |
153567-153578 |
| 153601-153750 |
| 5271, 5272, 5273, 5274, 5279, 5285, 5287, 5302, 5307, 5384 |
2120 |
156701-157800 |
| Royal Oak 5402 |
2121 |
158101-159300 |
| 159601-160100 |
| Hours, Minutes |
2003 |
161001-163300 |
| Lady |
2050 |
164901-165100 |
| Lady |
2052 |
165101-165800 |
| Hours, Minutes, Small Seconds |
2001 |
166601-167600 |
| Hours, Minutes |
2003 |
170801-170900 |
| NA |
2430 |
126801-126900 |
| Hours, Minutes |
5017 |
175401-175416 |
| Hours, Minutes |
5017 |
175481-175500 |
- 1976 -
| Watch Reference | Caliber Reference | Serial Number |
|---|
| NA |
2430 |
133601-133700 |
| 5271, 5272, 5273, 5274, 5279, 5285, 5287, 5302, 5307, 5384 |
2120 |
157801-158000 |
| Royal Oak 5402 |
2121 |
160101-160300 |
| Hours, Minutes |
2003 |
163301-164300 |
| Lady |
2052 |
165801-166400 |
| Lady |
2050 |
166401-166600 |
| Hours, Minutes, Small Seconds |
2001 |
167601-168800 |
| Hours, Minutes |
2003 |
170901-171100 |
| Royal Oak 5402 |
2121 |
171301-172300 |
| 5271, 5272, 5273, 5274, 5279, 5285, 5287, 5302, 5307, 5384 |
2120 |
172301-172900 |
| Royal Oak Lady 8638 |
2062 |
175601-176600 |
| Hours, Minutes |
2003 |
177601-178500 |
| Hours, Minutes |
2090 |
179701-181200 |
- 1977 -
| Watch Reference | Caliber Reference | Serial Number |
|---|
| NA |
2430 |
133701-133900 |
| Lady |
2050 |
144291-144300 |
| Hours, Minutes |
2003 |
171101-171300 |
| 5271, 5272, 5273, 5274, 5279, 5285, 5287, 5302, 5307, 5384 |
2120 |
172901-173100 |
| Royal Oak 5402 |
2121 |
173101-174500 |
| 5271, 5272, 5273, 5274, 5279, 5285, 5287, 5302, 5307, 5384 |
2120 |
174501-174800 |
| Royal Oak Lady 8638 |
2062 |
176601-177300 |
| Hours, Minutes |
2003 |
178501-179700 |
| Hours, Minutes |
2090 |
181201-182200 |
| Lady |
2052 |
183701-185700 |
| Royal Oak 4100 |
2123 |
186201-187180 |
| NA |
2122 |
187181-187190 |
| Royal Oak 4100 |
2123 |
187191-187400 |
| Hours, Minutes |
2003 |
188301-189000 |
| Quartz 6005 |
2511 |
200001-201000 |
- 1978 -
| Watch Reference | Caliber Reference | Serial Number |
|---|
| NA |
2430 |
133901-134200 |
| Hours, Minutes, Small Seconds |
2001 |
168801-169100 |
| 5271, 5272, 5273, 5274, 5279, 5285, 5287, 5302, 5307, 5384 |
2120 |
174801-175000 |
| Royal Oak 5402 |
2121 |
175001-175400 |
| Royal Oak 8638ST |
2062 |
177301-177600 |
| Hours, Minutes |
2090 |
182201-183400 |
| Lady |
2052 |
185701-185800 |
| Royal Oak 4100 |
2123 |
187400-188300 |
| Hours, Minutes |
2003 |
189001-190400 |
| Lady |
2052 |
190401-191900 |
| Royal Oak Lady 8638 |
2062 |
192501-193600 |
| Hours, Minutes |
2003 |
194501-194700 |
| Royal Oak 5402 |
2121 |
196601-197500 |
| Royal Oak 4100 |
2123 |
204001-204900 |
- 1979 -
| Watch Reference | Caliber Reference | Serial Number |
|---|
| Hours, Minutes |
2090 |
183401-183700 |
| Lady |
2052 |
191901-192500 |
| Royal Oak 8638ST |
2062 |
193601-194500 |
| Hours, Minutes |
2003 |
194701-196600 |
| Royal Oak 5402 |
2121 |
197501-198700 |
| Hours, Minutes |
2003 |
198701-198800 |
| Hours, Minutes |
2003 |
199101-199300 |
| Quartz 6005 |
2511 |
201001-201800 |
| Royal Oak Lady Quartz |
2502 |
201801-201900 |
| Royal Oak 4100 |
2123 |
204901-206100 |
| Hours, Minutes |
2090 |
206101-207300 |
| Lady |
2052 |
208201-209300 |
| Royal Oak 5402 |
2121 |
211501-211900 |
| Royal Oak 5402 |
2121 |
212201-212500 |
| 5271, 5272, 5273, 5274, 5279, 5285, 5287, 5302, 5307, 5384 |
2120 |
211901-212200 |
- 1980 -
| Watch Reference | Caliber Reference | Serial Number |
|---|
| Hours, Minutes |
2003 |
198801-199100 |
| Hours, Minutes |
2003 |
199301-200000 |
| Royal Oak Lady Quartz |
2502 |
201901-204000 |
| Hours, Minutes |
2090 |
207301-208200 |
| Lady |
2052 |
209301-210300 |
| Hours, Minutes |
2003 |
210301-211500 |
| 5271, 5272, 5273, 5274, 5279, 5285, 5287, 5302, 5307, 5384 |
2120 |
212501-212900 |
| 225301-225500 |
| Royal Oak 5402 |
2121 |
212901-213600 |
| 225201-225300 |
| Royal Oak 4100 |
2123 |
215301-216900 |
| 227601-228100 |
| Royal Oak Lady Quartz |
2502 |
216901-219000 |
| NA |
5020 |
227301-227600 |
| Hours, Minutes |
2080 |
229001-231600 |
| Quartz 6005 |
2511 |
241801-243800 |
| Pocket Watch |
5020 |
243801-244130 |
- 1981 -
| Watch Reference | Caliber Reference | Serial Number |
|---|
| NA |
2430 |
213851-214250 |
| Royal Oak Lady Quartz |
2502 |
219001-224700 |
| Royal Oak 5402 |
2121 |
225601-225700 |
| 5271, 5272, 5273, 5274, 5279, 5285, 5287, 5302, 5307, 5384 |
2120 |
225701-226000 |
| 4100 |
2123 |
228101-229000 |
| 241101-241800 |
| Hours, Minutes |
2080 |
231601-234900 |
| Hours, Minutes |
2003 |
239001-240500 |
| Pocket Watch |
5020 |
244151-244400 |
| 263701-263800 |
- 1982 -
| Watch Reference | Caliber Reference | Serial Number |
|---|
| NA |
2430 |
214251-214600 |
| 5271, 5272, 5273, 5274, 5279, 5285, 5287, 5302, 5307, 5384 |
2120 |
226001-226100 |
| 226201-226300 |
| 226401-226700 |
| Royal Oak 5402 |
2121 |
226101-226200 |
| 226302-226400 |
| Hours, Minutes |
2080 |
234901-236600 |
| Hours, Minutes |
2003 |
240501-241100 |
| 256301-256400 |
| 256501-257300 |
| Royal Oak 4100 |
2123 |
244401-245000 |
| Royal Oak Lady Quartz |
2502 |
246301-252500 |
| Royal Oak Quartz 56023 |
2506 |
258601-260100 |
| Pocket Watch |
5020 |
263801-264100 |
| NA |
2430 |
265101-265250 |
- 1983 -
| Watch Reference | Caliber Reference | Serial Number |
|---|
| 5271, 5272, 5273, 5274, 5279, 5285, 5287, 5302, 5307, 5384 |
2120 |
226701-226830 |
| 226901-227100 |
| 286831-286930 |
| Royal Oak 5402 |
2121 |
226831-226900 |
| Hours, Minutes |
2080 |
236601-237200 |
| NA |
2508 |
303381-303780 |
| Royal Oak Lady Quartz |
2502 |
252501-255500 |
| Hours, Minutes |
2003 |
257301-258600 |
| 270101-270300 |
| Royal Oak Quartz 56023 |
2506 |
260101-261100 |
| 262901-263100 |
| NA |
2505 |
260651-260690 |
| Royal Oak 14332 |
2125 |
267701-267790 |
| 269211-269240 |
| 269241-269390 |
| 269251-269260 |
| 279921-280030 |
| Pocket Watch |
5020 |
280431-280530 |
| Huitième Chronographe |
2126 |
281231-281330 |
| 304991-305080 |
| Lady Quartz |
2601 |
299781-299880 |
- 1984 -
| Watch Reference | Caliber Reference | Serial Number |
|---|
| Quantième Perpétuel |
2120 QP |
227101-227300 |
| 273302-274000 |
| 274121-274200 |
| Hours, Minutes |
2080 |
237201-239000 |
| 281331-281930 |
| 290131-290170 |
| Royal Oak Lady Quartz |
2502 |
255501-256300 |
| 275731-277130 |
| Royal Oak Quartz 56023 |
2506 |
261101-261700 |
| Royal Oak 5402 |
2121 |
263601-263700 |
| NA |
2430 |
265751-265950 |
| NA |
2711 GP |
282331-282630 |
| Quartz |
2508 |
285031-285336 |
| Royal Oak 14332 |
2125 |
288031-288330 |
| 269401-270100 |
| 278731-279240 |
| 297031-297230 |
| Hours, Minutes |
2003 |
270301-271700 |
| Hours, Minutes Skeleton |
2120 SQ |
274001-274120 |
- 1985 -
| Watch Reference | Caliber Reference | Serial Number |
|---|
| Royal Oak Quartz 56023 |
2506 |
261701-262400 |
| NA |
2430 |
265951-266050 |
| Hours, Minutes |
2080 |
281531-282330 |
| 289731-290130 |
| Quartz |
2508 |
283331-285030 |
| 285331-286030 |
| 291031-291330 |
| NA |
2120 9D |
286031-286530 |
| Royal Oak 14332, 25594 |
2124 |
288331-288530 |
| 288731-289730 |
| 297231-297430 |
| Royal Oak 14332 |
2125 |
288531-288730 |
| Hours, Minutes |
2003 |
271701-272700 |
| NA |
2120 9D |
274201-274800 |
| Royal Oak Lady Quartz |
2502 |
277131-277730 |
| 296931-297030 |
| 297431-297480 |
| Hours, Minutes, Lady |
2052 |
290731-291030 |
| 297481-297580 |
- 1986 -
| Watch Reference | Caliber Reference | Serial Number |
|---|
| Hours, Minutes |
2003 |
256401-256500 |
| 272701-273200 |
| Royal Oak Quartz 56023 |
2506 |
262401-262900 |
| NA |
2124 QP |
281031-281040 |
| NA |
2120 QP |
286531-286830 |
| Royal Oak 5402 |
2121 |
271801-274810 |
| Royal Oak 14332, 25594 |
2124 |
277731-278730 |
| 297981-298480 |
| NA |
2508 |
291331-292930 |
| NA |
2092 |
298481-298880 |
| Quartz |
2601 |
299181-299786 |
| 309281-309380 |
| Hours, Minutes |
2080 |
299881-300980 |
| Royal Oak 14486, 14544 |
2131 |
300581-300680 |
| 300881-301180 |
| NA |
2130 |
300681-300880 |
| 301181-301780 |
| Quartz |
2508 |
302581-303380 |
| Royal Oak Lady |
2610 |
303981-304580 |
| Huitième Chronographe |
2126 |
304981-304990 |
| NA |
2711 6P |
305381-305480 |
- 1987 -
| Watch Reference | Caliber Reference | Serial Number |
|---|
| Royal Oak 14332 |
2125 |
245001-245200 |
| 245701-245900 |
| 275001-275100 |
| Huitième Chronographe |
2126 |
245201-245500 |
| 246101-246300 |
| 264701-264800 |
| 306731-306930 |
| Royal Oak 14332, 25594 |
2124 |
245501-245700 |
| 245901-246100 |
| 264801-265000 |
| 274901-275000 |
| Royal Oak Quartz 56023 |
2506 |
263101-263600 |
| NA |
2130 |
301781-302380 |
| Quartz |
2508 |
303781-303980 |
| 266051-266650 |
| 307031-307630 |
| Quartz |
2601 |
266651-267100 |
| 307631-307730 |
| 305481-305630 |
| Royal Oak Lady |
2610 |
304581-304980 |
| 305631-306230 |
| 307731-308040 |
| 309731-309930 |
| Quantième Perpétuel |
2120 QP |
286931-287130 |
| 306631-306730 |
| NA |
2505 |
306931-307030 |
| 309931-310330 |
| Hours, Minutes |
2080 |
287131-287830 |
| 308931-309730 |
- 1988 -
| Watch Reference | Caliber Reference | Serial Number |
|---|
| Huitième Chronographe |
2126 |
275101-275200 |
| 295341-295380 |
| 295391-295430 |
| 295631-295730 |
| 315841-315930 |
| 316131-316390 |
| Hours, Minutes Skeleton |
2003 SQ |
275301-275400 |
| 293331-294030 |
| 296001-296040 |
| Hours, Minutes Skeleton |
2120 SQ |
294031-294530 |
| 315731-315840 |
| Hours, Minutes, Seconds, Date |
2125 |
294531-294630 |
| 295431-295630 |
| 295731-295830 |
| 316331-316430 |
| Royal Oak 14332, 25594, Day-Date |
2124 |
294631-295340 |
| 316431-316530 |
| 315931-316130 |
| NA |
2840 |
295381-295390 |
| Quartz |
2601 |
295831-296000 |
| 296041-296630 |
| 317631-317730 |
| 316931-317340 |
| Royal Oak Lady |
2610 |
296631-296830 |
| 310631-310830 |
| 311131-311330 |
| 311531-311730 |
| 312031-312230 |
| 312531-312930 |
| Royal Oak Lady |
2130 |
302381-302580 |
| 314431-314530 |
| Royal Oak 14486, 14544 |
2131 |
306431-306630 |
| 314531-314930 |
| Hours, Minutes |
2080 |
310331-310430 |
| 313031-314430 |
| 315131-315730 |
| Royal Oak 56175 |
2612 |
310431-310630 |
| 310831-311130 |
| 311331-311530 |
| 311731-312630 |
| 312231-312530 |
| 312931-316930 |
| 317341-317630 |
| 317731-318130 |
| 312931-312950 |
| 318131-318180 |
| 318181-318230 |
| 318231-319240 |
| 330531-330730 |
- 1989 -
| Watch Reference | Caliber Reference | Serial Number |
|---|
| Hours, Minutes |
2080 |
319941-321230 |
| 322131-323830 |
| Royal Oak 14486, 14544 |
2131 |
321231-321930 |
| NA |
213A |
321931-322130 |
| Hours, Minutes |
2003 |
323831-324230 |
| Quantième Perpétuel |
2120 QP |
324231-324730 |
| Hours, Minutes Skeleton |
2120 SQ |
329931-330030 |
| Royal Oak 14332, 25594, Day-Date |
2124 |
324731-325030 |
| 325931-326230 |
| Huitième Chronographe |
2126 |
325031-325330 |
| 325631-325930 |
| Hours, Minutes, Seconds, Date |
2125 |
325331-325630 |
| 329631-329930 |
| Quartz |
2508 |
326231-326430 |
| Quartz |
2601 |
326431-326730 |
| Royal Oak 56175 |
2612 |
327531-328130 |
| 328631-329230 |
| 328131-328630 |
| Royal Oak Lady |
2610 |
329231-329240 |
| 329241-329630 |
How to date a Royal Oak ref. 5402ST by the letter engraved on the back of the watch
Please note that only an extract from the archives provided by the manufacturer can confirm the date of your watch. It is common to have a discrepancy between the production year and the sale year of the watch.
| Series |
Production Period |
| A |
1972-1974 |
| B |
1974-1975 |
| C |
1975-1976 |
| D |
1976-early 80s |
For other Royal Oak references, based on our observations, you can estimate as follows:
| Letter |
Production Period |
| D |
1991-1998 |
| E |
1998-2003 |
| F |
2003-2010 |
| G |
2009-2011 |
| H |
2011-2015 |
| I |
2013-2015 |
| J |
2015-2020 |
