The Seiko 4N21-0750 is a watch model based on the 4N21 movement.
Parts List
| 160A02SN02 | crystal - crystal (sapphire) |
| 6M30B9NNG0 | crown - crown |
| 0F140BAA3 | case back gasket - case back gasket |
| D018BZ | band - metal band |
| D018CZ | band - band |
| 3BA075F1BNG | others - second hand |
| 1BC045A1BNG | others - hour hand |
| 2BC065A1BNG | others - minute hand |
| 0351155 | others - winding stem |
| DZ0040B01 | others - crown and stem gasket |
| 81182699 | others - bracelet fixing pipe |
| 81609399 | others - bracelet fixing pin |
| 82833415 | others - case ring |
| 4N2107507NA | others - case |
| 81613759 | others - bracelet fixing pin |
| 4N210750 | others - case back |
| 4N21075075A | others - case |
| 4N211440XG14 | others - dial |
| 4N211450XS19 | others - dial |
| 4N2164 | others - machine code |
| 1BF045A1BNG | others - hour hand |
| 2BF065A1BNG | others - minute hand |