Seiko Watch Production Date Calculator

In the last year this software has been used to successfully calculate the production dates of over 25,000 watches. Based on usage data, we have calculated the most popular movement numbers. The top 50 are listed in the table below.

Rank: Count: Movement:
1 10413 7S26
2 8346 6309
3 4045 6139
4 2967 7002
5 2427 6119
6 1820 6138
7 1640 7S36
8 1520 4006
9 1353 6106
10 1347 6R15
11 1260 7005
12 1098 7T32
13 1089 7019
14 1069 6105
15 1030 4R36
16 1029 7006
17 772 4205
18 683 5606
19 485 6117
20 428 5626
21 426 7546
22 382 8L35
23 346 6602
24 313 7C46
25 287 2205
26 275 7A38
27 270 6306
28 259 7A28
29 237 2906
30 210 7016
31 196 5740
32 172 7625
33 152 5625
34 143 6619
35 141 5126
36 126 5000
37 118 2706
38 103 8F32
39 101 6146
40 99 7017
41 93 7A48
42 93 4502
43 91 6020
44 80 5106
45 78 6118
46 78 4R15
47 76 5T52
48 72 6159
49 67 6145
50 65 5216