The Seiko 5Y91-5089 is a watch model based on the 5Y91 movement.
Parts List
| RE2N72GN00 | crystal |
| RE2N72GN | crystal |
| 30MA6NA1 | crown - crown |
| 0G0055B01 | case back gasket - crown and stem gasket |
| 0G0055B0 | case back gasket |
| 0H2600B01 | case back gasket - case back gasket |
| 09T04N1H | others - hour hand |
| 0354786 | others - winding stem |
| 5Y915089 | others - case back |
| 5Y91508925 | others - case |
| 5Y915108XS14 | others - dial |
| 5Y919 | others - machine code |
| 82824240 | others - case ring |
| A200BS | others - push pin |
| 13SC04A2 | others - second hand |
| 2BA090A0BNG | others - minute hand |
| 09T18NGM | others - minute hand |
Caliber 5Y91
