The Remo Populär was designed, patented and made by the Rempt brothers in Suhl. It was a successor to the Remo and Geha shotguns made by Rempt post-WW1 on surplus Mauser M98 actions. By the mid-1920s the supply of such "junked" actions had dried up and Mauser 98 actions became too valueable to be converted to cheap shotguns. Gebrueder Rempt, Suhl, patented the design of their Populär in 1925, DRP #443437. These shotguns were not conversions of any military bolt action, but were made from scratch by the Rempts.
Heinrich Böker, Remscheid, was a German exporter of tools and hardware.