The Seiko 5C23-503A is a watch model based on the 5C23 movement.
Parts List
| ESGN38JU01 | crystal |
| 35MC8NA1 | crown |
| 0H2520N01 | case back gasket - case back gasket |
| 0H2520N | case back gasket |
| BNA57G | band - leather band |
| BNZ36G | band - leather band |
| 04B04FG | hand - sub hand |
| 10T28NGH | others - hour hand |
| 10T28NGM | others - minute hand |
| 0354856 | others - winding stem |
| 0354800 | others - winding stem |
| 0801794 | others - date dial |
| 0866526 | others - holding ring for dial |
| 5C235020XN14 | others - dial |
| 5C23503A | others - case back |
| 5C23503AJJ | others - case |
| 5C239 | others - machine code |
| 82802360 | others - case ring |
| A170BS | others - push pin |
| 0Z0060B01 | others - crown and stem gasket |
| 12SC35VG | others - second hand |
Caliber 5C23
Other models with the same movement
| 5C23-5000 |
| 5C23-5009 |
| 5C23-5010 |
| 5C23-5020 |
| 5C23-5030 |
| 5C23-6000 |
| 5C23-600A |
| 5C23-6010 |
| 5C23-6020 |
| 5C23-7000 |
| 5C23-7009 |
| 5C23-7010 |
| 5C23-7019 |
| 5C23-7020 |
| 5C23-7030 |
| 5C23-8000 |
| 5C23-8009 |
| 5C23-8019 |
| 5C23-8020 |
| 5C23-8030 |
| 5C23-8040 |