The Seiko 5Y23-8B00 is a watch model based on the 5Y23 movement.
Parts List
| 290W85LN01 | crystal - crystal (inorganic) |
| 35MK9NN1 | crown |
| 35MK9NS1 NL | crown |
| 35MK9NS1 | crown |
| 0F296BA11 | case back gasket - case back gasket |
| DH0100B01 | case back gasket - crown and stem gasket (4h) |
| 86584630 | crystal gasket - plastic gasket for crystal |
| 86584410 | crystal gasket - plastic gasket for crystal |
| 86584415 | crystal gasket - plastic gasket for crystal |
| T1006G | band - metal band |
| T1006S | band - metal band |
| 13SC09T1 | others - second hand |
| 3AA125F1A6S | others - second hand |
| 12SC39T2 | others - second hand |
| 3AA125F3A6S | others - second hand |
| 3AA125F3ANG | others - second hand |
| A180BS | others - push pin |
| 0351105 | others - winding stem |
| 0801722 | others - date dial |
| 5Y238B00 | others - case back |
| 5Y238B0061 | others - case |
| 5Y238B0061A | others - case |
| 5Y238B0075 | others - case |
| 5Y238D5LXB13 | others - dial |
| 5Y238D5LXG14 | others - dial |
| 5Y238D5LXS13 | others - dial |
| 5Y238D6LXS13 | others - dial |
| 82342431 | others - bezel |
| 82342439 | others - bezel |
| 82732990 | others - case ring |
| 12P95MSH | others - hour hand |
| 12P95MSM | others - minute hand |
| 12P11MSM | others - minute hand |
| 12P11MKM | others - minute hand |
| 13SC09T2 | others - second hand |
| 12P11MGM | others - minute hand |
| 12P11MSH | others - hour hand |
| 12P11MKH | others - hour hand |
| 12P11MGH | others - hour hand |