Help needed to identify Kth 41 by bxx -what exactly is it?

[Gerard/Relic Hunter]

Hi, I have an optical device of some sort, Kth 41, made by manufacturer code bxx, that can be plugged in and takes a bulb, You move the 2 arms and it moves the circular plate around. Does anyone know what it is, is used for and what it does?

Thanks,

Gerard

[MAUSER99]

???

GERARD...a guy near me has one of these. It has to be for veiwing some sort of hi altitude film ?? Thats my guess..

[Gerard/Relic Hunter]

bxx is Askania. Possible Mauser99, I've had standard Luftwaffe film viewers before that were for topographical ariel photos, but this thing is much more elaborate and weighs a ton.

[mlespaul]

It's basically what you're already suspecting it's a kino (film) viewer for microfilm. you hook the film spool to one end and feed it through, view it through the ocular and the rotation allows you to look at the various corners of the frame as you're scrolling through.

Yes, it's for observational film taken by aircraft.

[Gerard/Relic Hunter]

It's basically what you're already suspecting it's a kino (film) viewer for microfilm. you hook the film spool to one end and feed it through, view it through the ocular and the rotation allows you to look at the various corners of the frame as you're scrolling through.

Yes, it's for observational film taken by aircraft.

Thanks, much appreciated!