The Seiko 2A23-0290 is a watch model based on the 2A23 movement.
Parts List
| 195T31AA | crystal |
| 195T31AAG0 | crystal - crystal (organic) |
| 195T31AAS0 | crystal - crystal (organic) |
| 195T20ADG1 | crystal |
| 195T20ADS1 | crystal |
| 32M13NS1 | crown |
| 32M13NA1 | crown |
| 0F150BAA | case back gasket |
| 0F150BAA1 | case back gasket - case back gasket |
| G5050C | band - metal band |
| G5050C-LKG | band - link |
| G5050S | band - metal band |
| G5050C-PB1 | clasp - parts for buckle/clasp |
| G5050C-BK1S | clasp - clasp |
| 08S21BGH | hand - hour hand |
| 08S21BGM | hand - minute hand |
| 08S21BSH | hand - hour hand |
| 08S21BSM | hand - minute hand |
| 3BA125F1BNS | others - second hand |
| 3BA125F1BNG | others - second hand |
| A120BS | others - push pin (for lb) |
| 0801298 | others - date dial |
| 0884141 | others - holding ring for dial |
| 83138950 | others - case ring |
| EB0055B01 | others - crown and stem gasket |
| 0354073 | others - winding stem |
| 08SC29NS | others - second hand |
| G5050C-EPS | others - endpiece |
| 2A23029061 | others - case |
| 2A23029098 | others - case |
| 2A23052LXB13 | others - dial |
| 2A23052LXG28 | others - dial |
| 2A2310 | others - machine code |
| 82360351 | others - bezel |
| 82360359 | others - bezel |
| EB0055B0 | others - crown gasket |
| 08SC29NG | others - second hand |
| 07S11BGM | others - minute hand |
| 07S11BGH | others - hour hand |
Caliber 2A23
