The Seiko 5S21-7A20 is a watch model based on the 5S21 movement.
Parts List
310W74JM02 | crystal |
310W74JM | crystal |
35M82NH1 | crown |
0A2600B01 | case back gasket |
0A2600B | case back gasket |
BPZ60E | band - leather band |
0351683 | others - winding stem |
82803220 | others - case ring |
5S217A10XS24 | others - dial |
5S217A20 | others - case back |
5S217A20WG | others - case |
5S219 | others - machine code |
A180BS | others - push pin |
12SC28TB | others - second hand |
0Z0060B01 | others - crown and stem gasket |
11TA8AGH | others - hour hand |
11TA8AGM | others - minute hand |
Caliber 5S21
![Caliber manual page](https://www.theseikoguy.com/media/movements/5/5S21A_caliber_en_1.jpg)
![Caliber manual page](https://www.theseikoguy.com/media/movements/5/5S21A_caliber_en_2.jpg)
![Caliber manual page](https://www.theseikoguy.com/media/movements/5/5S21A_caliber_en_3.jpg)
![Caliber manual page](https://www.theseikoguy.com/media/movements/5/5S21A_caliber_en_4.jpg)
![Caliber manual page](https://www.theseikoguy.com/media/movements/5/5S21A_caliber_en_5.jpg)
![Caliber manual page](https://www.theseikoguy.com/media/movements/5/5S21A_caliber_en_6.jpg)
![Caliber manual page](https://www.theseikoguy.com/media/movements/5/5S21A_caliber_en_7.jpg)