The Seiko 1221-5680 is a watch model based on the 1221 movement.
Parts List
| ESYN37SN01 | crystal - crystal (sapphire) |
| 27M03DA5 | crown - crown |
| 0F160NA11 | case back gasket |
| KK20A | band - leather band |
| 06SS113G | hand - second hand |
| 07S45JGM | hand - minute hand |
| 07S51JGH | hand - hour hand |
| 12210980XG14 | others - dial |
| 122110 | others - machine code |
| 122156804FA | others - case |
| 82730450 | others - case ring |
| A110AS | others - push pin |
| 0351117 | others - winding stem |
| DZ0040B01 | others - crown and stem gasket |
Caliber 1221
