The Seiko 8420-7379 is a watch model based on the 8420 movement.
Parts List
| RE5N42SM01 | crystal |
| RE5N42SM02 | crystal |
| 25M28NA1 | crown |
| 0H1610N01 | case back gasket |
| Z5120G | band - metal band |
| Z5120S | band - metal band |
| Z5120S-BK6S | clasp - clasp |
| Z5120S-PB3 | clasp - parts for buckle/clasp |
| Z5120G-BK6G | clasp - clasp |
| Z5120G-PB3 | clasp - parts for buckle/clasp |
| 0354815 | others - winding stem |
| 81181859 | others - bracelet fixing pipe |
| 81606479 | others - bracelet fixing pin |
| 82723860 | others - case ring |
| 84202140XN14 | others - dial |
| 84202150XG14 | others - dial |
| 84207 | others - machine code |
| 8420737925 | others - case |
| 842073792N | others - case |
| DZ0041B01 | others - crown and stem gasket |
| 04V04DGM | others - minute hand |
| 04V04NGH | others - hour hand |
Caliber 8420
