Possibly Johst envisioned the (FN) Browning 1910/22, but it was more likely the 1910 (FN) Browning he had in mind, and probably in caliber 7,65mm Browning (aka .32 ACP). The 1922 was a military adaptation of the 1910, a holster sidearm with longer barrel & magazine suited for a full grip, as...