The Seiko 1221-5730 is a watch model based on the 1221 movement.
Parts List
ES9W91SV01 | crystal - crystal (sapphire) |
30M19N05 | crown |
0Z0034B01 | case back gasket - crown and stem gasket |
0F145BAA1 | case back gasket |
DB10A | band - metal band |
07S51JGH | hand - hour hand |
07S51JGM | hand - minute hand |
122110 | others - machine code |
12211030XS14 | others - dial |
1221573050A | others - case |
82721570 | others - case ring |
0351117 | others - winding stem |
07SS09VG | others - second hand |
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)