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 10340 7S26
2 8313 6309
3 4022 6139
4 2963 7002
5 2407 6119
6 1806 6138
7 1633 7S36
8 1516 4006
9 1345 6106
10 1329 6R15
11 1257 7005
12 1089 7T32
13 1078 7019
14 1067 6105
15 1025 7006
16 1019 4R36
17 767 4205
18 675 5606
19 482 6117
20 426 5626
21 424 7546
22 376 8L35
23 337 6602
24 306 7C46
25 287 2205
26 275 7A38
27 269 6306
28 259 7A28
29 234 2906
30 209 7016
31 196 5740
32 172 7625
33 151 5625
34 143 6619
35 141 5126
36 126 5000
37 118 2706
38 102 8F32
39 101 6146
40 98 7017
41 93 7A48
42 93 4502
43 91 6020
44 80 5106
45 78 6118
46 78 4R15
47 75 5T52
48 70 6159
49 67 6145
50 62 5216