The Seiko 1N01-0020 is a watch model based on the 1N01 movement.
Parts List
| 165A19JN02 | crystal - crystal |
| 6M30E5SNS0 | crown - crown |
| 0F150BA1S | case back gasket - case back gasket |
| 49G9JB | band - band |
| 49G9JB-LK3 | band - link |
| 49G9JB-BK1 | clasp - buckle |
| 49G9JB-BKI | clasp - buckle |
| 3BA075F1BNS | others - second hand |
| 1BA045A5BNS | others - hour hand |
| 2BA067A5BNS | others - minute hand |
| 81606439 | others - bracelet fixing pin |
| 81190075 | others - bracelet fixing pipe |
| 82822700 | others - case ring |
| 1N010020T0A | others - case |
| 1N010020 | others - case back |
| 0351807 | others - winding stem |
| DB004BAD1 | others - crown and stem gasket |
| 1N010028XL13 | others - dial |
| 1N010038XB19 | others - dial |
| 1N010038XS19 | others - dial |
| 1N019 | others - machine code |
| 49G9JB-EP1 | others - endpiece |
Caliber 1N01
