The Seiko 1N01-0C50 is a watch model based on the 1N01 movement.
Parts List
| 180W40JN01 | crystal |
| 180W40JN | crystal |
| 30MA2NA1 | crown - crown |
| 0A1800B01 | case back gasket |
| EZ0035B0 | case back gasket |
| B5639S | band |
| B5639J-LKS | band - link |
| B5639S-LKS | band - link |
| B5639J | band |
| B5639S-PB1 | clasp - parts for buckle/clasp |
| B5639J-PB1 | clasp - parts for buckle/clasp |
| B5639S-BK2S | clasp - clasp |
| B5639J-BK2S | clasp - clasp |
| 3BA075F0BNG | others - second hand |
| 1BB052A0BNG | others - hour hand |
| 2BB075A0BNG | others - minute hand |
| 0351807 | others - winding stem |
| 81180229 | others - bracelet fixing pipe |
| 81604259 | others - bracelet fixing pin |
| 82823860 | others - case ring |
| 1N010C50 | others - case back |
| 1N010C506Y | others - case |
| 1N010C506YZ | others - case |
| 1N010D30XL14 | others - dial |
| 1N010D38XL14 | others - dial |
| 1N019 | others - machine code |
| EZ0035B01 | others - crown and stem gasket |
| 07TA8NAM | others - minute hand |
| 07TA8NAH | others - hour hand |
Caliber 1N01
