The Seiko 8C23-5100 is a watch model based on the 8C23 movement.
Parts List
| ES9W49LZ10 | crystal |
| ES9W49LZ50 | crystal |
| 40MH1NN1 | crown - crown |
| OF210BAA1 | case back gasket |
| EB0055B01 | others - crown and stem gasket |
The Seiko 8C23-5100 is a watch model based on the 8C23 movement.
| ES9W49LZ10 | crystal |
| ES9W49LZ50 | crystal |
| 40MH1NN1 | crown - crown |
| OF210BAA1 | case back gasket |
| EB0055B01 | others - crown and stem gasket |