The Seiko 1N01-0B50 is a watch model based on the 1N01 movement.
Parts List
| 170W12JU01 | crystal |
| 170W12JU | crystal |
| 30MA2NA1 | crown - crown |
| 0A1500B01 | case back gasket |
| EZ0035B0 | case back gasket |
| WFA24E | band |
| 07SC02NG | others - second hand |
| A100BS | others - push pin (for mb) |
| 1N010B50 | others - case back |
| 1N010B50WG | others - case |
| 1N010B90XG14 | others - dial |
| 1N019 | others - machine code |
| 82821620 | others - case ring |
| 0351807 | others - winding stem |
| EZ0035B01 | others - crown and stem gasket |
| 06TC0NGM | others - minute hand |
| 06TC0NGH | others - hour hand |
Caliber 1N01
