The Seiko 4N00-6120 is a watch model based on the 4N00 movement.
Parts List
| BA1A43JN02 | crystal |
| BA1A43JN | crystal |
| 6M30B5SNW0 | crown - crown |
| 6M30B5NNG0 | crown - crown |
| 6M30B5NN | crown |
| 6M30B5SN | crown |
| 0F160BAA5 | case back gasket - case back gasket |
| B5751G | band |
| B5751G-LKG | band - link |
| B5751S-LKS | band - link |
| B5751S | band |
| B5751G-BK4G | clasp - clasp |
| B5751S-BK4S | clasp - clasp |
| 2CE047L0BDS | others - minute hand |
| 1CE032LABDG | others - hour hand |
| 1CE032LABDS | others - hour hand |
| 0351155 | others - winding stem |
| DZ0040B01 | others - crown and stem gasket |
| 81182699 | others - bracelet fixing pipe |
| 81609399 | others - bracelet fixing pin |
| 81609579 | others - bracelet fixing pin |
| 4N003530XB14 | others - dial |
| 4N003530XG14 | others - dial |
| 4N003530XS13 | others - dial |
| 4N0061 | others - machine code |
| 4N006120 | others - case back |
| 4N00612079 | others - case |
| 4N006120RH | others - case |
| 82862590 | others - case ring |
| 2CE047L0BDG | others - minute hand |
| 05Y03DSH | others - hour hand |
| 05Y03DGH | others - hour hand |