The Seiko 4K25-0020 is a watch model based on the 4K25 movement.
Parts List
| 180NC1JN | crystal |
| 180NC1JN01 | crystal |
| 40MY7NN1 | crown |
| 0G1890B02 | case back gasket - case back gasket |
| DZ0040B0 | case back gasket |
| 0G1890B0 | case back gasket |
| WKJ15G | band - leather band |
| 07T51AGH | others - hour hand |
| 07T51CGM | others - minute hand |
| 3BA075F1BNG | others - second hand |
| 07SC43NG | others - second hand |
| DZ0040B01 | others - crown and stem gasket |
| 81606511 | others - bracelet fixing pin |
| 81607999 | others - bracelet fixing pin |
| 81180249 | others - bracelet fixing pipe |
| 81181919 | others - bracelet fixing pipe |
| 82830130 | others - case ring |
| 4K250010XS24 | others - dial |
| 4K25002025 | others - case |
| 4K2560 | others - machine code |
Caliber 4K25
Other models with the same movement
| 4K25-0010 |
| 4K25-0039 |