The Seiko 1221-5550 is a watch model based on the 1221 movement.
Parts List
ESRN99JN00 | crystal - crystal (inorganic) |
30N63NA1 | crown - crown |
0H1550B01 | case back gasket |
ZS09A | band - metal band |
3BA075F1BNG | others - second hand |
1AA042A1BNG | others - hour hand |
07SC25NG | others - second hand |
07P27DGH | others - hour hand |
07P27DGM | others - minute hand |
2AA065A1BDG | others - minute hand |
2AA065A1BNG | others - minute hand |
12210790XB14 | others - dial |
12210790XG14 | others - dial |
122110 | others - machine code |
1221555025 | others - case |
82711370 | others - case ring |
DZ0040B01 | others - crown and stem gasket |
0351117 | others - winding stem |
T080AS | others - push pin |
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)