The Seiko 2320-5590 is a watch model based on the 2320 movement.
Parts List
| SA3N00GN00 | crystal |
| 30M08NS1 | crown - crown ersatz |
| 30M08NA1 | crown - crown |
| 0A1900N01 | case back gasket - case back gasket |
| 0G0055B01 | case back gasket - crown and stem gasket |
| 0A1900N0 | case back gasket |
| MV912 | band - band |
| MV922 | band - band |
| MV931 | band - band |
| MV911 | band - band |
| 07R01DGH | others - hour hand |
| 07R01DGM | others - minute hand |
| A110BS | others - push pin (for mb) |
| 23201 | others - machine code |
| 2320106001G9 | others - dial |
| 232010603GE9 | others - dial |
| 232010709984 | others - dial |
| 232010709993 | others - dial |
| 07R01DSH | others - hour hand |
| 232055902E | others - case |
| 2320559025 | others - case |
| 83119020 | others - case ring |
| 0354811 | others - winding stem |
| 07R01DSM | others - minute hand |
| 07R04DBH | others - hour hand |
| 07R04DBM | others - minute hand |
Caliber 2320
