The Seiko 8420-6540 is a watch model based on the 8420 movement.
Parts List
| RE4N12SN00 | crystal - crystal |
| 25M02NA4 | crown - crown |
| 0G1700N01 | case back gasket |
| RI047 | band - band |
| 81921761 | clasp - clasp |
| 03R08AGH | others - hour hand |
| 03R08CGM | others - minute hand |
| 0354815 | others - winding stem |
| 84201120XG14 | others - dial |
| 8420654025 | others - case |
| 82714720 | others - case ring |
| DZ0041B01 | others - crown and stem gasket |
Caliber 8420
