The Seiko 4N20-0730 is a watch model based on the 4N20 movement.
Parts List
| 165A02SN02 | crystal |
| 25M25DA5 | crown - crown (3h) |
| 0H1500B01 | case back gasket - case back gasket |
| 0F140BAA3 | case back gasket - case back gasket |
| 81614099 | band - bracelet fixing pin |
| ZB42A | band - metal band |
| ZB43A | band - metal band |
| 06Y19DGM | others - minute hand |
| 81604259 | others - bracelet fixing pin |
| 81181839 | others - bracelet fixing pipe |
| 82840910 | others - case ring |
| 4N200730 | others - case back |
| 4N20073075A | others - case |
| 4N201240XA19 | others - dial |
| 4N2061 | others - machine code |
| 82280271 | others - bezel |
| 0351155 | others - winding stem |
| DZ0040B01 | others - crown and stem gasket |
| 06Y19NGH | others - hour hand |