The Seiko 4N20-0630 is a watch model based on the 4N20 movement.
Parts List
| 175A02SN02 | crystal - crystal |
| 25M25DA5 | crown - crown (3h) |
| 25M25NS5 | crown - crown |
| 0H1600B01 | case back gasket - case back gasket |
| MK46F | band - leather band |
| MK47F | band - leather band |
| 1CC040AABNG | others - hour hand |
| 1CC040AABNS | others - hour hand |
| DZ0040B01 | others - crown and stem gasket |
| 0351155 | others - winding stem |
| 05Y33JAH | others - hour hand |
| 82841030 | others - case ring |
| 4N200630 | others - case back |
| 4N20063029A | others - case |
| 4N200630FYA | others - case |
| 4N201130XG15 | others - dial |
| 4N201130XS15 | others - dial |
| 4N2061 | others - machine code |
| 89942935 | others - back plate |
| A100AS | others - push pin |
| 05Y33JAM | others - minute hand |
| 05Y33JCH | others - hour hand |
| 05Y33JCM | others - minute hand |
| 2CC055AABNG | others - minute hand |
| 2CC055AABNS | others - minute hand (upper) |