Noun
An alloy of copper and zinc, resembling brass, and containing about 84 per cent of copper; -- called also German, / Dutch, brass. It is very malleable and ductile, and when beaten into thin leaves is sometimes called Dutch metal. The addition of arsenic makes white tombac.
Source: Webster's dictionaryOriginally the cartridge had a cupro-nickel jacketed bullet and Berdan primer, but it now has a tombac jacketed bullet and lead-free Boxer primer. Source: Internet
The version worn by the Prussian Gardes du Corps was of tombac (copper and zinc alloy) with silver mountings. Source: Internet
The bullet is a 4.1 g (63 gr) tombac jacketed FMJ projectile with a G1 ballistic coefficient of 0.331 (ICAO) / 0.337 (Army Metro). Source: Internet