The Seiko 1320-5550 is a watch model based on the 1320 movement.
Parts List
| ES7N39KN00 | crystal |
| 35NA1NA1 | crown |
| 35NE1NA5 | crown |
| 0H1700B01 | case back gasket - bezel gasket |
| DH0100B01 | case back gasket - crown and stem gasket (4h) |
Caliber 1320
Seiko 1320-5550 Watch Guide