The Seiko 3421-521A is a watch model based on the 3421 movement.
Parts List
RE2N02GN00 | crystal |
30M06NA1 | crown - crown |
30M06NS1 | crown - crown |
0G0055B01 | case back gasket - crown and stem gasket |
0A1900N0 | case back gasket |
Caliber 3421
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The Seiko 3421-521A is a watch model based on the 3421 movement.
RE2N02GN00 | crystal |
30M06NA1 | crown - crown |
30M06NS1 | crown - crown |
0G0055B01 | case back gasket - crown and stem gasket |
0A1900N0 | case back gasket |