The Seiko 4N20-0840 is a watch model based on the 4N20 movement.
Parts List
| 200A02JN02 | crystal - crystal |
| 25M25DA5 | crown - crown (3h) |
| 0F170BAA3 | case back gasket - case back gasket |
| MK22G | band - band |
| A130AS | others - push pin (for lb) |
| 4N201390XS14 | others - dial |
| 4N2060 | others - machine code |
| 4N2008407NA | others - case |
| 4N200840 | others - case back |
| 4N2008407NB | others - case |
| 4N2008407NC | others - case |
| 82832715 | others - case ring |
| DZ0040B01 | others - crown and stem gasket |
| 08Y31VCH | others - hour hand |
| 08Y31VGM | others - minute hand |
| 1CD060AABAA | others - hour hand |
| 2CD085AABCA | others - minute hand |