The Seiko 4N01-0550 is a watch model based on the 4N01 movement.
Parts List
| 175W19JM | crystal |
| 175W19JM01 | crystal - crystal |
| 6M30A3NNG0 | crown - crown |
| 6M30A3NN | crown |
| 0F150BAA | case back gasket |
| 0F150BAA5 | case back gasket - case back gasket |
| 4130BB | band |
| 4GF6ZY | band - leather band |
| 4130CB-LKG | band - link |
| 4130BB-LKG | band - link |
| 4130CB | band |
| 4130BB-BK4G | clasp - clasp |
| 4130CB-BK4G | clasp - clasp |
| 1BG045LABDG | others - hour hand |
| 2BG070LABDG | others - minute hand |
| 3BA075F1BNG | others - second hand |
| 2BB065A1BNG | others - minute hand |
| 0351155 | others - winding stem |
| DZ0040B01 | others - crown and stem gasket |
| 82851170 | others - case ring |
| 4N010550 | others - case back |
| 4N01055075A | others - case |
| 4N01055079A | others - case |
| 4N011090XS14 | others - dial |
| 4N011100XG14 | others - dial |
| 4N011100XG24 | others - dial |
| 4N0161 | others - machine code |
| T070BS | others - push pin |
| 1BB045A1BNG | others - hour hand |