undated but probably "vintage" ad (click to enlarge)
I have seen other versions of the pipe gun in books. This was not a unique idea. However, I would dispute that a single-shot, short-barreled, awkward to handle .25 caliber pistol could be described as "formidable." Furthermore, having experienced shooting a .22 derringer, I would hazard a bet that if this pistol is fired as shown, recoil would make it jump right out of the shooter's hand.