The Seiko 8123-5129 is a watch model based on the 8123 movement.
Parts List
| SA5W56GN00 | crystal |
| 35M82NA1 | crown - crown |
| 35M82NS1 | crown - crown |
| 0A2800N01 | case back gasket - case back gasket |
| 0A2800N | case back gasket |
| 86567220 | crystal gasket - plastic gasket for crystal |
| B1122G | band - metal band |
| B1122G-LKG | band - link |
| B1122G-PB1 | clasp - parts for buckle/clasp |
| B1122G-BK1G | clasp - clasp |
| B1122G-EPG | others - endpiece |
| A200BS | others - push pin |
| 0354765 | others - winding stem |
| 0801622 | others - date dial |
| 8123512975 | others - case |
| 81235140XG18 | others - dial |
| 81239 | others - machine code |
| 82711280 | others - case ring |
| 13SC04A2 | others - second hand |
| 0Z0060B01 | others - crown and stem gasket |
| 11C56AGM | others - minute hand |
| 11C56AGH | others - hour hand |
Caliber 8123
