The Seiko 1N01-0A20 is a watch model based on the 1N01 movement.
Parts List
| 170W06JM01 | crystal |
| 30MA2NA1 | crown - crown |
| 0A1500B01 | case back gasket |
| EZ0035B0 | case back gasket |
| BHZ46E | band |
| BHA46S | band - leather band |
| WHA27E | band - leather band |
| BHZ47E | band |
| BHA51E | band |
| 07SC02NG | others - second hand |
| 3BA075F0BNG | others - second hand |
| 1BF047L0BDG | others - hour hand |
| 0351807 | others - winding stem |
| 82821620 | others - case ring |
| 1N010A20 | others - case back |
| 1N010A207E | others - case |
| 1N010A20WG | others - case |
| 1N010A20X924 | others - dial |
| 1N010A20XB14 | others - dial |
| 1N010C20XN14 | others - dial |
| 1N010D10XN14 | others - dial |
| 1N010D90X914 | others - dial |
| 1N019 | others - machine code |
| A120AS | others - push pin |
| EZ0035B01 | others - crown and stem gasket |
| 2BF070L0BDG | others - minute hand |
| 1BG045L0BDG | others - hour hand |
| 07TE4NGM | others - minute hand |
| 06T36DAM | others - minute hand |
| 2BG070L0BDG | others - minute hand |
| 07T55DGM | others - minute hand |
| 07T11DGM | others - minute hand |
| 07TE4NGH | others - hour hand |
| 06T36DAH | others - hour hand |
| 07T55DGH | others - hour hand |
| 07T11DGH | others - hour hand |
Caliber 1N01
