The Seiko 3Y03-0100 is a watch model based on the 3Y03 movement.
Parts List
| 205W35HN01 | crystal - crystal |
| 205W35HN | crystal |
| 45ED9NA1 | crown |
| 45ED9NS1 | crown |
| FE223BAA3 | case back gasket |
| 0G235BA1 | case back gasket |
| 86582330 | crystal gasket |
| B5542C-LKG | band - link |
| B5542S | band |
| B5542C | band |
| B5542C-PB1 | clasp - parts for buckle/clasp |
| B5542C-BK1S | clasp - clasp |
| B5542C-EPG | others - endpiece |
| 0801752 | others - date dial |
| 0884155 | others - holding ring for dial |
| 0G235BA13 | others - rotating bezel gasket |
| 3Y030100 | others - case back |
| 3Y03010098 | others - case |
| 3Y03019LXG14 | others - dial |
| 82831990 | others - case ring |
| 86012631 | others - rotating bezel |
| A150BS | others - push pin |
| 0E012BAA1 | others - crown and stem gasket |
| 0D014BA11 | others - crown and stem gasket |
| 3AX090F1AL1 | others - second hand |
| 08SC73PH | others - second hand |
| 3AX090F1ALG | others - second hand |
| 08SC73PS | others - second hand |
| 08SC73PG | others - second hand |
| 3AX090F1AL2 | others - second hand |
| 08S77LSM | others - minute hand |
| 08S77LPM | others - minute hand |
| 08S77LGM | others - minute hand |
| 08S77LSH | others - hour hand |
| 08S77LPH | others - hour hand |
| 08S77LGH | others - hour hand |