The Seiko 3421-5040 is a watch model based on the 3421 movement.
Parts List
SA3N34GN00 | crystal - crystal |
30M06NA1 | crown - crown |
30M06NS1 | crown - crown |
0G0055B01 | case back gasket - crown and stem gasket |
0A1900N0 | case back gasket |
Caliber 3421
![Caliber manual page](https://www.theseikoguy.com/media/movements/3/3421A_caliber_en_1.jpg)
![Caliber manual page](https://www.theseikoguy.com/media/movements/3/3421A_caliber_en_2.jpg)
![Caliber manual page](https://www.theseikoguy.com/media/movements/3/3421A_caliber_en_3.jpg)
![Caliber manual page](https://www.theseikoguy.com/media/movements/3/3421A_caliber_en_4.jpg)
![Caliber manual page](https://www.theseikoguy.com/media/movements/3/3421A_caliber_jp_1.jpg)
![Caliber manual page](https://www.theseikoguy.com/media/movements/3/3421A_caliber_jp_2.jpg)
![Caliber manual page](https://www.theseikoguy.com/media/movements/3/3421A_caliber_jp_3.jpg)
The Seiko 3421-5040 is a watch model based on the 3421 movement.
SA3N34GN00 | crystal - crystal |
30M06NA1 | crown - crown |
30M06NS1 | crown - crown |
0G0055B01 | case back gasket - crown and stem gasket |
0A1900N0 | case back gasket |