The Seiko 3Y03-0A30 is a watch model based on the 3Y03 movement.
Parts List
| 200W26LN01 | crystal - crystal |
| 200W26LN | crystal |
| 30MB6NA1 | crown |
| 0A1900N01 | case back gasket - case back gasket |
| EZ0035B0 | case back gasket |
| 86580100 | crystal gasket - plastic gasket for crystal |
| 86179140 | bezel gasket - plastic gasket for bezel |
| B5492W-LKG | band - link |
| B5492L-LKG | band - link |
| B5492C-LKG | band - link |
| B5492G-LKG | band - link |
| B5492K-LKG | band - link |
| B5492L | band - metal band |
| B5492C | band - metal band |
| B5492W | band |
| B5492G | band |
| BJJ56K | band |
| B5492K | band |
| B5492C-BK1S | clasp - clasp |
| B5492L-BK1S | clasp - clasp |
| B5492K-PB1 | clasp - parts for buckle/clasp |
| B5492G-PB1 | clasp - parts for buckle/clasp |
| B5492K-BK1G | clasp - clasp |
| B5492C-PB1 | clasp - parts for buckle/clasp |
| B5492G-BK1G | clasp - clasp |
| B5492L-PB1 | clasp - parts for buckle/clasp |
| B5492W-BK1G | clasp - clasp |
| B5492W-PB1 | clasp - parts for buckle/clasp |
| 08T02NGH | others - hour hand |
| 08T14NGM | others - minute hand |
| 08SC14NG | others - second hand |
| A130AS | others - push pin (for lb) |
| 0866553 | others - holding ring for dial |
| 0878505 | others - date dial |
| 3Y030A30 | others - case back |
| 3Y030A3075 | others - case |
| 3Y030A3098 | others - case |
| 3Y030A30XF | others - case |
| 3Y030A4LXG14 | others - dial |
| 3Y030A4LXS14 | others - dial |
| 3Y030A4WXG14 | others - dial |
| 3Y030A4WXS14 | others - dial |
| 3Y030B28XS14 | others - dial |
| 3Y030B38XS14 | others - dial |
| 3Y037 | others - machine code |
| 82344641 | others - bezel |
| 82801600 | others - case ring |
| 0351546 | others - winding stem |
| B5492W-EPG | others - endpiece |
| EZ0035B01 | others - crown and stem gasket |
| 08TF4LGM | others - minute hand |
| 08TF4LGH | others - hour hand |
| 08TA0A1H | others - hour hand |
| 08TA0A1M | others - minute hand |