Junghans J81; Junghans 681.70; Front
Junghans J81; Junghans 681.70; movement
Junghans J81; Junghans 681.70; back
Junghans J80; Junghans 681.70; massive screw back
Here you can get more informationen about this watch: Junghans answer to the Oyster: Junghans 681.70; Junghans J81
Here you can find some more information about the version with 7 Jewels: Junghans J81; Junghans 681.70; 7 Jewels