The Seiko 5421-516A is a watch model based on the 5421 movement.
Parts List
ES4N76GN00 | crystal - crystal |
35M94NA1 | crown |
0G0055B01 | case back gasket - crown and stem gasket |
0A1800N01 | case back gasket |
MK66A | band - band |
07SC02NG | others - second hand |
06T18DGM | others - minute hand |
06T24DGH | others - hour hand |
A120BS | others - push pin (for lb) |
54210390XS14 | others - dial |
54211 | others - machine code |
5421516A25 | others - case |
0354705 | others - winding stem |
82706080 | others - case ring |
Caliber 5421
![Caliber manual page](https://www.theseikoguy.com/media/movements/5/5421A_caliber_en_1.jpg)
![Caliber manual page](https://www.theseikoguy.com/media/movements/5/5421A_caliber_en_2.jpg)
![Caliber manual page](https://www.theseikoguy.com/media/movements/5/5421A_caliber_en_3.jpg)
![Caliber manual page](https://www.theseikoguy.com/media/movements/5/5421A_caliber_en_4.jpg)
![Caliber manual page](https://www.theseikoguy.com/media/movements/5/5421A_caliber_en_5.jpg)
![Caliber manual page](https://www.theseikoguy.com/media/movements/5/5421A_caliber_en_6.jpg)
![Caliber manual page](https://www.theseikoguy.com/media/movements/5/5421A_caliber_en_7.jpg)
![Caliber manual page](https://www.theseikoguy.com/media/movements/5/5421A_caliber_en_8.jpg)
![Caliber manual page](https://www.theseikoguy.com/media/movements/5/5421A_caliber_en_9.jpg)