The Seiko 4N01-0251 is a watch model based on the 4N01 movement.
Parts List
| 185P01H20A | crystal |
| 185P01H2 | crystal |
| 35MR9NN1 | crown |
| 0F155BAA | case back gasket |
| 0F160BAA5 | case back gasket - case back gasket |
| 0F155BAA5 | case back gasket |
| 86561071 | crystal gasket |
| B5648L | band |
| B5648L-LKG | band - link |
| B5648L-BK4S | clasp - clasp |
| 3BA075F1BNG | others - second hand |
| 07SC17NG | others - second hand |
| DZ0040B01 | others - crown and stem gasket |
| 81181459 | others - bracelet fixing pipe |
| 81611239 | others - bracelet fixing pin |
| 4N010250 | others - case back |
| 4N0102517H | others - case |
| 4N010451XS14 | others - dial |
| 4N0161 | others - machine code |
| 82843270 | others - case ring |
| 0351156 | others - winding stem |
| 2BA075A1BNG | others - minute hand |
| 07T03NGM | others - minute hand |
| 1BA050A1BNG | others - hour hand |
| 07T03NGH | others - hour hand |