The Seiko 7731-5100 is a watch model based on the 7731 movement.
Parts List
| ES6N85SN00 | crystal - crystal |
| 32N13N05 | crown - crown |
| 0H2200B01 | case back gasket - rotating bezel gasket |
| AA04B | band - band |
| 773151001CA | others - case |
| 82703350 | others - case ring |
| 77315100XG14 | others - dial |
| 773162 | others - machine code |
| A190BS | others - push pin |
| DZ0040B01 | others - crown and stem gasket |
| 0354371 | others - winding stem |
| 10SC39VG | others - second hand |
| 10P03DGH | others - hour hand |
| 10P03DGM | others - minute hand |
| ES6N85SN00 | crystal - crystal |
| 32N13N05 | crown - crown |
| 0H2200B01 | case back gasket - rotating bezel gasket |
| AA04B | band - band |
| 773151001CA | others - case |
| 82703350 | others - case ring |
| 77315100XG14 | others - dial |
| 773162 | others - machine code |
| A190BS | others - push pin |
| DZ0040B01 | others - crown and stem gasket |
| 0354371 | others - winding stem |
| 10SC39VG | others - second hand |
| 10P03DGH | others - hour hand |
| 10P03DGM | others - minute hand |