The Seiko 5H23-637H is a watch model based on the 5H23 movement.
Parts List
| 265W31HK01 | crystal |
| 50E41NS1 | crown |
| FE278BAA1 | case back gasket |
| 0G295BA1 | case back gasket |
| 86580290 | crystal gasket |
| BPA83S | band |
| 1AB075LCBB2 | hand - hour hand |
| 2AB105LBBB2 | hand - minute hand |
| 5H23633LXB19 | others - dial |
| 5H23637H61 | others - case |
| 81504799 | others - screw |
| 82360619 | others - bezel |
| 86012336 | others - rotating bezel |
| A180CS | others - push pin |
| 0354096 | others - winding stem |
| 0G295BA11 | others - rotating bezel gasket |
| 82812490 | others - case ring |
| 0801765 | others - date dial |
| 0E012BAA1 | others - crown and stem gasket |
| 3AX110F3AP2 | others - second hand |
| 10SC59PG | others - second hand |
| 10PA3BGM | others - minute hand |
| 10PA3BGH | others - hour hand |
Caliber 5H23
