Failed to sell at auction.
While most major pistols made before the 1930s had some type of shoulder stock available as an option, the Luger had much more variety of stocks than most others. In addition to the several types of wooden stocks made on military contract, there were also several commercial types of folding stocks made. One of these was the Benke-Thiemann, originally designed by Hungarian Josef von Benke and improved by Georg Thiemann.
This stock was made of sheet metal stampings, and attached by replacing the grip panels of a Luger pistol. When folded, the stock added remarkably little size to the gun, and could still be fired, albeit with a somewhat awkward grip. This was done by cleverly designing the stock to consist of two layers of material which overlaid each other when folded, but then could be held end to end when extended, providing a stock of surprisingly usable length and sturdiness. A single spring-loaded latch was employed to lock the stock in both the folded and extended position.
Ultimately the stock failed to be a commercial success, probably due to costs and worldwide economics in the 1920s when it was developed. Only a few hundred were made, although the serial numbers all have leading zeroes to accommodate an anticipated production in the tens of thousands.
Luger 1902 Carbine: https://www.youtube.com/watch?v=_fJwN0Vq7gM
Stocked FN 1903: https://www.youtube.com/watch?v=03lBYIJtneY
Colt 1851 w/ Canteen Stock: https://www.youtube.com/watch?v=RZzIgy4DsKQ
Mauser Schnellfeuer: https://www.youtube.com/watch?v=alpefGkv2VI
Fiala 1920 Combination Gun: https://www.youtube.com/watch?v=GabtQN6Fbf0
Grandpa Nambu w/ Stock: https://www.youtube.com/watch?v=cVayzA2A_Ks
At Forgotten Weapons I think the most interesting guns out there are the most obscure ones. I try to search out experimental and prototype weapons and show you how they work, in addition to more conventional guns that you may not have heard of before. You’re much more likely to find a video on the Cei Rigotti or Webley-Fosbery here than an AR or Glock. So, do you want to learn about something new today? Then stick around!