The Seiko 3Y03-0099 is a watch model based on the 3Y03 movement.
Parts List
| 205W35HN01 | crystal - crystal |
| 205W35HN | crystal |
| 45ED9NA1 | crown |
| FE223BAA | case back gasket |
| FE223BAA3 | case back gasket |
| 86582330 | crystal gasket |
| B5543C NL | band |
| 0D014BA11 | others - crown and stem gasket |
| 08SC75PH | others - second hand |
| 08S75LGM | others - minute hand |
| 3AX090F1ALG | others - second hand |
| 08S75LGH | others - hour hand |