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
![Caliber manual page](https://www.theseikoguy.com/media/movements/1/1221A_caliber_jp_1.jpg)
![Caliber manual page](https://www.theseikoguy.com/media/movements/1/1221A_caliber_jp_2.jpg)
![Caliber manual page](https://www.theseikoguy.com/media/movements/1/1221A_caliber_jp_3.jpg)
![Caliber manual page](https://www.theseikoguy.com/media/movements/1/1221A_caliber_jp_4.jpg)