Hello,
A unfamiliar (to me) manufacturer Weimar and a photo of its Sachsen Doppeldecker at :
https://www.ebay.de/itm/Foto-PK-Weim...oAAOSwB0he0Yce
It probably was not intended for military use so may be off topic on this threa. Not sure if its a war time or post war machine. Anyone know anything about it at all?
Here another interesting image from the same manufacturer with a cross on the underside of the wing this time so either wartime or even prewar:
https://www.ebay.de/itm/Foto-PK-Wk-1...AAAOSwsvhe0YXn
And another photo :
https://www.ebay.de/itm/Foto-PK-Weim...kAAOSwOFZe0Ydj
Also from rthe same seller is another obscure manufacturer Erich Schmidt at:
https://www.ebay.de/itm/Foto-PK-Flug...8AAOSw5Mle0YY4
Regards,
Clint