The Seiko 2639-5020 is a watch model based on the 2639 movement.
Parts List
SA6N99KN00 | crystal |
35R05NS1 | crown |
013060B01 | case back gasket |
Caliber 2639
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Other models with the same movement
2639-5000 |
2639-5010 |
2639-5030 |
2639-5039 |
2639-7000 |
2639-7009 |
2639-8000 |
2639-8009 |