The Seiko 4N01-5050 is a watch model based on the 4N01 movement.
Parts List
| BA1A65JN02 | crystal |
| BA1A65JN | crystal |
| 6M30B5NNG0 | crown - crown |
| 6M30B5NN | crown |
| 0F140BAA | case back gasket |
| 0F140BAA3 | case back gasket - case back gasket |
| 4205BZ-LKG | band - link |
| 4205CZ | band |
| 4205CZ-LKG | band - link |
| 4205BZ | band |
| 4205CZ-BK4G | clasp - clasp |
| 4205BZ-BK4G | clasp - clasp |
| 3BA050F1BNG | others - second hand |
| 2BG045LABDG | others - minute hand |
| A100BS | others - push pin (for mb) |
| DZ0040B01 | others - crown and stem gasket |
| 0351155 | others - winding stem |
| 4N011060XB14 | others - dial |
| 4N011060XG14 | others - dial |
| 4N011060XG24 | others - dial |
| 4N011060XS14 | others - dial |
| 4N015050 | others - case back |
| 4N01505075A | others - case |
| 4N0150507HA | others - case |
| 4N0161 | others - machine code |
| 82870130 | others - case ring |
| 1BG032L0BDG | others - hour hand |