The Seiko 4N21-0370 is a watch model based on the 4N21 movement.
Parts List
| 160A02SN02 | crystal - crystal (sapphire) |
| 6M30A3NNG1 | crown - crown |
| 0F140BAA3 | case back gasket - case back gasket |
| ZA36A | band - metal band |
| 3BA075F1BNG | others - second hand |
| 1BF045L0BDG | others - hour hand |
| 2BF065L0BDG | others - minute hand |
| 0351155 | others - winding stem |
| 06T21DGH | others - hour hand |
| DZ0040B01 | others - crown and stem gasket |
| 82840910 | others - case ring |
| 4N210370 | others - case back |
| 4N210370SA | others - case |
| 4N210760XS14 | others - dial |
| 4N2164 | others - machine code |
| 82361715 | others - bezel |
| T070AS | others - push pin |
| 06T21DGM | others - minute hand |