The Seiko 5Y91-6120 is a watch model based on the 5Y91 movement.
Parts List
| 260WA2JM02 | crystal |
| 35MA8NS1 | crown |
| 35MA8NA1 | crown |
| 0A2300B01 | case back gasket |
| B1711G | band |
| B1711S | band - metal band |
| B1711G-BK5G | clasp - clasp |
| 0354786 | others - winding stem |
| 5Y916120 | others - case back |
| 5Y91612075 | others - case |
| 5Y91612079 | others - case |
| 5Y916240XB14 | others - dial |
| 5Y919 | others - machine code |
| 82820880 | others - case ring |
| A140BS | others - push pin |
| 13SC04A2 | others - second hand |
| 0Z0060B01 | others - crown and stem gasket |
| 09T38DAM | others - minute hand |
| 09T32DAH | others - hour hand |
Caliber 5Y91
