The Seiko W309-4A00 is a watch model based on the W309 movement.
Parts List
| ESJW56LM01 | crystal |
| ESJW56LM02 | crystal - crystal |
| ESJW56LM03 | crystal |
| ESJW56LM04 | crystal |
| 86578285 | crystal gasket - plastic gasket for crystal |
| 86578286 | crystal gasket |
| 0Z2900B01 | bezel gasket - dichtung |
| EC0060B01 | pusher - pusher gasket |
| 8060542A | pusher - button |
| 8060544B | pusher |
| 8060544C | pusher |
| JL90C | band - band |
| JL89C | band - leather band |
| JL91C | band - leather band |
| W3094A00N2 | others - case |
| A190CS | others - push pin |
| 81350540 | others - button spring |
| 83200271 | others - button spring clip |