The Seiko 4N00-0100 is a watch model based on the 4N00 movement.
Parts List
| 180A02JN02 | crystal - crystal |
| 180A02JN | crystal |
| 180W39JN01 | crystal |
| 180W39JN | crystal |
| 32M63NN1 | crown - crown |
| 32M63NA1 | crown |
| 0F150BAA5 | case back gasket - case back gasket |
| 0F150BAA | case back gasket |
| WHJ35G | band |
| WHJ36G | band |
| WHA25G | band |
| A120BS | others - push pin (for lb) |
| 4N000100 | others - case back |
| 4N00010075 | others - case |
| 4N000510XB14 | others - dial |
| 4N000510XG14 | others - dial |
| 4N000520XS24 | others - dial |
| 4N0061 | others - machine code |
| 82841070 | others - case ring |
| 0351156 | others - winding stem |
| DZ0040B01 | others - crown and stem gasket |
| 07Y23NGM | others - minute hand |
| 07Y19NGM | others - minute hand |
| 07Y19NGH | others - hour hand |
| 07Y23NGH | others - hour hand |