The Seiko 8123-5240 is a watch model based on the 8123 movement.
Parts List
| SA7W02GN00 | crystal |
| 35M82NS1 | crown - crown |
| FH2881B01 | case back gasket - case back gasket |
| 86571680 | crystal gasket |
| NA23A | band - metal band |
| 0354765 | others - winding stem |
| 82706380 | others - case ring |
| 0801622 | others - date dial |
| 0884967 | others - holding ring for dial |
| 8123524061 | others - case |
| 81235260XS17 | others - dial |
| 81239 | others - machine code |
| 84310082 | others - dial ring (lower) |
| 84310102 | others - dial ring (upper) |
| A180BS | others - push pin |
| 10C46ASH | others - hour hand |
| 10C46ASM | others - minute hand |
| 13SC04ES | others - second hand |
| 0Z0060B01 | others - crown and stem gasket |
Caliber 8123
