The Bo-Uk-1 FL23885 Blindfluguhr (blind-flight or instrumental flight), made by Junghans, was designed for flights without visibility.
It provided all the necessary about time in an airplane,
- time,
- flight time (when you select, with the arrow in the rotating bezel, the minute hand during the take off),
- timer. To activate the timer, you had to click the button situated on the bottom part. The second hand would start moving and the minutes counter hand at 6 o’clock. If you click the button again, it stops the timer and the next push resets both hands to zero. The timer was necessary for approachs with no visibility.
This clock was so valuable, that pilots were forced to take it and the gunsight in case of an emergency landing.
During the time it was being built, 5 other models were created, going from using a brass bezel and knobs to bakelite.
The Bo UK 1 has power for 36 hours, 11 jewels, and a 30BZ caliber.
There was 6 versions of this model, the 5 first where done with a brass bezel the last with bakelite is the more common. Betwen the five first versions the diferent was the handsetting, the first by pulling the knob, second has a push cap back, third hand setting at 3, foueth hand setting at 5, and fiveth second dial at 12.
Junghans J30D FL25591 comunication center.
Eigentum der Luftwaffe (Luftwaffe property) can be read below.
