The Seiko 8420-5070 is a watch model based on the 8420 movement.
Parts List
| ES2N86SN00 | crystal - crystal |
| 30M36NA3 | crown - crown |
| 0Z0034B01 | case back gasket - crown and stem gasket |
| 0Z1800N01 | case back gasket |
| MK21A | band - band |
| 07R20DGH | others - hour hand |
| 07R20DGM | others - minute hand |
| A100BS | others - push pin (for mb) |
| 84200390XG14 | others - dial |
| 84202 | others - machine code |
| 84205070XA12 | others - dial |
| 84205070XA22 | others - dial |
| 87000040 | others - dial sheet |
| 8420507025 | others - case |
| 83117360 | others - case ring |
| 0354815 | others - winding stem |
| DZ0041B01 | others - crown and stem gasket |
Caliber 8420
