The Seiko V821-0100 is a watch model based on the V821 movement.
Parts List
| 210P01LN03 | crystal - crystal (inorganic) |
| 9M35B1SNW0 | crown - crown |
| 9M35B1NNG0 | crown - crown |
| 86588575 | case back gasket |
| DB0055B01 | case back gasket - crown and stem gasket |
| 86589370 | crystal gasket |
| 0354122 | others - winding stem |
| 07SH01NS | others - second hand |
| 07SH01NG | others - second hand |
| 07H17NSM | others - minute hand |
| 07H17NGM | others - minute hand |
| 07H17NSH | others - hour hand |
| 07H17NGH | others - hour hand |