Glider part? Company Luft - Stuttgart?

[Theodor]

Yes, that's right. But I have one theory, probably about an optional instrument used on gliders and aircraft.

The manufacturers say it is an altimeter. Of course it is not, it is a clock mechanism. However they can not be wrong about it, so how can be a clock mechanism and altimeter related?

Thinking about the possible relation of the two devices, I reached my theory: could this be the driving engine of a recording altimeter, of an onboard barograph for recording the heights during the flight? An altimeter indicates the height and this wind-up engine rotates the rolls of paper. Quite possible? By chance, can you show me a picture of WW2 times German recording altimeter?