The Seiko 4N20-0780 is a watch model based on the 4N20 movement.
Parts List
| 165A11HN01 | crystal - crystal |
| 6M30B5NNG1 | crown - crown |
| 0F140BAA3 | case back gasket - case back gasket |
| DZ50B | band - band |
| 2CA067A5BNG | others - minute hand |
| 07Y31NGH | others - hour hand |
| 81606439 | others - bracelet fixing pin |
| 81181459 | others - bracelet fixing pipe |
| 82840910 | others - case ring |
| 4N2007802N | others - case |
| 4N201320XS14 | others - dial |
| 4N2061 | others - machine code |
| DZ0040B01 | others - crown and stem gasket |
| 0351155 | others - winding stem |
| 1CA047AABNG | others - hour hand |