The Seiko 8420-5660 is a watch model based on the 8420 movement.
Parts List
ES5N80SN00 | crystal |
25M02NS3 | crown |
0G2100N01 | case back gasket - case back gasket |
DI037 | others - other band |
09V02DGH | others - hour hand |
09V02DGM | others - minute hand |
DZ0041B01 | others - crown and stem gasket |
Caliber 8420
![Caliber manual page](https://www.theseikoguy.com/media/movements/8/8420A_caliber_en_1.jpg)
![Caliber manual page](https://www.theseikoguy.com/media/movements/8/8420A_caliber_en_2.jpg)
![Caliber manual page](https://www.theseikoguy.com/media/movements/8/8420A_caliber_en_3.jpg)
![Caliber manual page](https://www.theseikoguy.com/media/movements/8/8420A_caliber_en_4.jpg)
![Caliber manual page](https://www.theseikoguy.com/media/movements/8/8420A_caliber_en_5.jpg)
![Caliber manual page](https://www.theseikoguy.com/media/movements/8/8420A_caliber_en_6.jpg)
![Caliber manual page](https://www.theseikoguy.com/media/movements/8/8420A_caliber_en_7.jpg)
![Caliber manual page](https://www.theseikoguy.com/media/movements/8/8420A_caliber_en_8.jpg)
![Caliber manual page](https://www.theseikoguy.com/media/movements/8/8420A_caliber_en_9.jpg)
![Caliber manual page](https://www.theseikoguy.com/media/movements/8/8420B_caliber_en_1.jpg)
![Caliber manual page](https://www.theseikoguy.com/media/movements/8/8420B_caliber_en_2.jpg)
![Caliber manual page](https://www.theseikoguy.com/media/movements/8/8420B_caliber_en_3.jpg)
![Caliber manual page](https://www.theseikoguy.com/media/movements/8/8420B_caliber_en_4.jpg)