The Seiko 5Y23-7A39 is a watch model based on the 5Y23 movement.
Parts List
| 285P09HN03 | crystal |
| 285WA3HN01 | crystal |
| 285P09HN | crystal |
| 285WA3HN | crystal |
| 40E23NA1 | crown - crown |
| DE010BAA | case back gasket |
| FE298BAA1 | case back gasket - case back gasket |
| 86561230 | crystal gasket |
| 86591030 | bezel gasket - plastic gasket for bezel |
| Z1505C | band |
| 3AA125F1ANG | others - second hand |
| 12SC39T1 | others - second hand |
| DE010BAA1 | others - crown and stem gasket |
| 0351105 | others - winding stem |
| 11T21NGM | others - minute hand |
| 11T13NGH | others - hour hand |