The Seiko 6309-8850 is a watch model based on the 6309 movement.
Parts List
| 310T18ANS0 | crystal - crystal |
| 310T40ANG0 | crystal |
| 45M30NSI | crown |
| 45M30NA1 | crown |
| FH2980B01 | case back gasket - case back gasket |
| DJ0060B01 | others - crown gasket |
Caliber 6309
Seiko 6309-8850 Watch Guide