The Seiko W620-4370 is a watch model based on the W620 movement.
Parts List
| BA0P17L50A | crystal - crystal (inorganic) |
| 0F270BAA5 | case back gasket - case back gasket |
| 86640130 | crystal gasket - plastic gasket for crystal |
| F0N4AZ | band - band |
| 82836970 | others - case ring |
| W620437079A | others - case |
| W6204370 | others - case back |
| A180BS | others - push pin |
| AD006BA11 | others - crown and stem gasket |