The 11x45R MB was based on a shortened 11.15x60R military case. Probably introduced by Georg Roth in approximately 1876 and production continued until 1935. There are similar cartridges produced by Georg Roth with differing neck, shoulder and case lengths. Also produced by Utendoerffer and RWS and listed in the 1884 and 1900 catalogues respectively.
No 1 based on a segmented military case with GR monogram and February 1878 production.
No 2 produced by H. Utendoerffer of Nurnberg with raised lettering.