The Seiko 1221-5540 is a watch model based on the 1221 movement.
Parts List
ESSN23JN00 | crystal - crystal (inorganic) |
30N63NA1 | crown - crown |
0H1550B01 | case back gasket |
HS10A | band - metal band |
3BA075F1BNG | others - second hand |
1AA040A1BNG | others - hour hand |
2AA060A1BNG | others - minute hand |
06P05NGH | others - hour hand |
06P05NGM | others - minute hand |
12210780XG14 | others - dial |
122110 | others - machine code |
1221554025 | others - case |
82711030 | others - case ring |
06SC11NG | others - second hand |
0351117 | others - winding stem |
T090AS | others - push pin |
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)