The Seiko 1N01-5B50 is a watch model based on the 1N01 movement.
Parts List
| BA1A36JR02 | crystal - crystal |
| 6M40A2SNG1 | crown - crown |
| 6M40A2SMW1 | crown - crown |
| 0F150NA1S | case back gasket - case back gasket |
| 44P5BZ | band - band |
| 44P5KZ | band - band |
| 44P5JZ | band - band |
| 44P5BZ-LK4 | band - link |
| 44P5KZ-LK4 | band - link |
| 44P5BZ-BKN | clasp - buckle |
| 44P5KZ-BKN | clasp - buckle |
| 3BA075F0BNG | others - second hand |
| 3BA075F0BNS | others - second hand |
| 2BG050L0BDG | others - minute hand |
| 1BG037LABDG | others - hour hand |
| 2BB052A1BNG | others - minute hand |
| 2BB052A1BNS | others - minute hand |
| 1BB035A1BNG | others - hour hand |
| 1BB035A1BNS | others - hour hand |
| 0351807 | others - winding stem |
| DZ0040B01 | others - crown and stem gasket |
| 81606439 | others - bracelet fixing pin |
| 81181919 | others - bracelet fixing pipe |
| 82830340 | others - case ring |
| 1N015B5075 | others - case |
| 1N015B50 | others - case back |
| 1N015B5075Z | others - case |
| 1N015B5079Z | others - case |
| 1N011F70XG14 | others - dial |
| 1N011F78XG14 | others - dial |
| 1N011F78XS13 | others - dial |
| 1N011F88XS14 | others - dial |
| 1N019 | others - machine code |
| DZ0041B01 | others - crown and stem gasket |
Caliber 1N01
