Beistegui Hermanos S.A. (BH) is a Basque bicycle manufacturer founded in 1909 to make guns. In 1919, after World War I, BH began making bicycles. Prior to the Spanish Civil War 1936-39, Beistegui Hermanos also produced firearms, specifically copies of the Ruby pistol (as the 1914 Model) and Mauser C96 (as the MM31 and MM34).