The Seiko 4N00-0640 is a watch model based on the 4N00 movement.
Parts List
| 170N25JM01 | crystal |
| 6M30A3NNG0 | crown - crown |
| 6M30A3NN | crown |
| 0F150BAA | case back gasket |
| 0F150BAA5 | case back gasket - case back gasket |
| ZFA19H | band |
| 1CE045L2BDG | others - hour hand |
| 2CE065L2BDG | others - minute hand |
| A100BS | others - push pin (for mb) |
| 4N000640 | others - case back |
| 4N000640WE | others - case |
| 4N002230XG24 | others - dial |
| 4N002240XN14 | others - dial |
| 4N0061 | others - machine code |
| 82842010 | others - case ring |
| 0351155 | others - winding stem |
| DZ0040B01 | others - crown and stem gasket |