The Seiko 7731-5091 is a watch model based on the 7731 movement.
Parts List
| ES9N79SN00 | crystal |
| 0Z0034B01 | case back gasket - crown and stem gasket |
| 0F225BAA3 | case back gasket - rotating bezel gasket |
| JA09A | band - metal band |
| 11P01DGH | others - hour hand |
| 77315090XG14 | others - dial |
| 7731509100A | others - case |
| 773162 | others - machine code |
| A170BS | others - push pin |
| 11SC25VG | others - second hand |
| 11P01DGM | others - minute hand |
| 2AB110LABDG | others - minute hand |