Hello,
Currently on ebay is a photo of Otto Militär Doppeldecker No.102 (?) at:
https://www.ebay.de/itm/Histor-Echtf...QAAOSw6K1fwW2v
Also, although its a reprint I thought I'd post the following photo of an Otto from German East Africa as it gives a nice view of the of precision bomb aiming technology of the time, available even for use in the overseas terriories of the Reich..
https://www.ebay.co.uk/itm/F000797-9...MAAOSwUu5fwEg4
Second link amended. Thanks to Stig for the next post in the thread.
Regards,
Clint