The Seiko 1N00-5B40 is a watch model based on the 1N00 movement.
Parts List
| RE3W34JN01 | crystal |
| RE3W34JN | crystal |
| 30MH2NA1 | crown |
| 0A2100B01 | case back gasket |
| EZ0035B0 | case back gasket |
| BKJ39G | band - leather band |
| BKA26S | band |
| BKJ38S | band |
| BKJ37G | band |
| 1N000E40X919 | others - dial |
| 1N000E40X929 | others - dial |
| 1N000E50XS19 | others - dial |
| 1N005B40 | others - case back |
| 1N005B4075 | others - case |
| 1N005B407N | others - case |
| 1N009 | others - machine code |
| 82822860 | others - case ring |
| A140AS | others - push pin |
| 0351807 | others - winding stem |
| EZ0035B01 | others - crown and stem gasket |
| 07YA6AGM | others - minute hand |
| 07YA6AAM | others - minute hand |
| 07YA6AGH | others - hour hand |
| 07YA6AAH | others - hour hand |
Caliber 1N00
