The Seiko 8J56-8020 is a watch model based on the 8J56 movement.
Parts List
| 290P11S201 | crystal - crystal (sapphire) |
| 290P11S20A | crystal |
| 1E50C9SNW0 | crown |
| 6E50A4STS1 | crown - crown |
| 0H308BAA1 | case back gasket - case back gasket |
| 86573930 | crystal gasket - plastic gasket for crystal |
| 86172740 | bezel gasket - plastic gasket for bezel |
| D373AB | band - metal band |
| D373AB-LK00 | band - link |
| D1F9AB | band - band |
| D373AB-BK00 | clasp - clasp |
| 1AA085LGBEJ | others - hour hand |
| 1AA085LGBEK | others - hour hand |
| 2AA125LCBEJ | others - minute hand |
| 2AA125LCBEK | others - minute hand |
| 3EA125A2BDS | others - second hand |
| 82836200 | others - case ring |
| 8J56802061A | others - case |
| 0351406 | others - winding stem |
| 82314999 | others - bezel |
| 8J568020 | others - case back |
| 8J56802061B | others - case |
| 82314995 | others - bezel |
| D373AB-BKPP | others - spring bar for buckle/clasp |
| D373AB-LK01 | others - half adjust link |
| S190CS | others - push pin |
| 0A0150B0A | others - crown and stem gasket |
| 3DA125ABA9S | others - second hand |
Other models with the same movement