Mars was Bergmann's first really successful pistol aimed at military market. Early examples, about 100 of total 1000 or so Mars pistols made, were chambered for 7.63mm Mauser cartridge. Later Mars pistols identified by a large "9mm" on chamber, were chambered for special 9mm cartridge that later became known as 9mm Bergmann-Bayard. Mars was adopted by Spanish government in 1905 as their first military automatic pistol, but none were ever delivered by Bergmann. At least two Mars pistols were also made in .45-caliber for U.S. Army trials in 1906, but did not perform well and were dropped from the trials; these are too rare to price. NOTE: Add 25 percent for low serial number guns chambered for 7.63mm Mauser; 50 percent for original Bergmann Mars holster stock.