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 10508 7S26
2 8396 6309
3 4062 6139
4 2979 7002
5 2437 6119
6 1846 6138
7 1656 7S36
8 1526 4006
9 1362 6R15
10 1360 6106
11 1264 7005
12 1106 7T32
13 1101 7019
14 1077 6105
15 1044 4R36
16 1036 7006
17 776 4205
18 691 5606
19 486 6117
20 429 7546
21 429 5626
22 384 8L35
23 348 6602
24 316 7C46
25 293 2205
26 275 7A38
27 272 6306
28 261 7A28
29 238 2906
30 210 7016
31 196 5740
32 174 7625
33 152 5625
34 144 6619
35 142 5126
36 126 5000
37 118 2706
38 103 8F32
39 101 6146
40 99 7017
41 95 7A48
42 93 4502
43 91 6020
44 80 5106
45 79 6118
46 78 4R15
47 77 5T52
48 73 6159
49 67 6145
50 67 5216