The Seiko 3421-5110 is a watch model based on the 3421 movement.
Parts List
| SA3N96GN00=NL | crystal - formcrystal |
| 35M82NA1 | crown - crown |
| 35M84NS3 | crown |
| 35M84NA3 | crown |
| 0A2600N01 | case back gasket - case back gasket |
Caliber 3421
Seiko 3421-5110 Watch Guide