[Ron Wood]

Gerben,
You started this thread with “…there is no authenticated image of Hugo Borchardt known”. That may very well still be the case. But in 2012 Mobray Publishing put out a large format (8 ½”X11”) paperback book “The Evolution of Military Automatic Pistols / Self-loading Pistol Designs of Two World Wars and the Men who Invented Them” by Gorden Bruce. There are 24 designs presented with biographical sketches of the inventors. The first article is on Hugo Borchardt and includes two photos that are identified as Hugo. I was very excited with this revelation and after a bit of digging through Mobray I was able to contact the author. He of course did not know me so he was not very forthcoming with information, but he did avow the photos were of Borchardt and that he had acquired them from an un-named source in Poland several years ago. That was the extent of the information I could obtain, so there remains a question if these photos are actually Borchardt, but they might be.
Ron