The Seiko 2320-6440 is a watch model based on the 2320 movement.
Parts List
| ES3N48SN00 | crystal |
| 30M26NA3 | crown - crown |
| 0A1900N01 | case back gasket - case back gasket |
| 0G0055B01 | case back gasket - crown and stem gasket |
| PK30A | band - band |
| 07R08CGH | others - hour hand |
| 07R08CGM | others - minute hand |
| 0354811 | others - winding stem |
| 232064402N | others - case |
| 82700200 | others - case ring |
| 23201 | others - machine code |
| 23202870XS19 | others - dial |
| A130BS | others - push pin |
Caliber 2320
