The Seiko 3Y03-0139 is a watch model based on the 3Y03 movement.
Parts List
| 190W53LN | crystal |
| 190W53LN00 | crystal |
| 32M39NN1 | crown |
| AC004BA1 | case back gasket |
| FH1980B01 | case back gasket - case back gasket |
| AC004BA11 | case back gasket - crown and stem gasket |
| 86564110 | crystal gasket - plastic gasket for crystal |
| 86590910 | bezel gasket - plastic gasket for bezel |
| Z5355K | band |
| Z5355L | band |
| 08SC01NG | others - second hand |
| 0351546 | others - winding stem |
| 3BA100F1BNG | others - second hand |
| 08S13BGM | others - minute hand |
| 08S13BGH | others - hour hand |