The Seiko 8T23-8020 is a watch model based on the 8T23 movement.
Parts List
| 285W91HN01 | crystal |
| 80E15NG1 | crown |
| 80E15NS1 | crown |
| FE298BA13 | case back gasket - case back gasket |
| 86581390 | crystal gasket |
| JK37A | band - leather band |
| JK38A | band - leather band |
| 12P99MKH | others - hour hand |
| 0351114 | others - setting/winding stem |
| 0801375 | others - date dial |
| 82801750 | others - case ring |
| 8T2310 | others - machine code |
| 8T23802061 | others - case |
| 8T238020WE | others - case |
| 8T23802LXB19 | others - dial |
| 8T23803LXB13 | others - dial |
| A190BS | others - push pin |
| 12P99MKM | others - minute hand |
| 12SC23XA | others - second hand |
| 3AA125F3AAY | others - second hand |
| 12SC23XW | others - second hand |
| 3AA125F3AAW | others - second hand |