C1920s. Format 6x13cm, type jumelle stereo camera. FilmPack, or store individual sheets 12 sheets. Or nickel metal body, grinding (most models). Gaumont Anastigmat f6," Trylor" f6.3 Roussel," Trylor C" Roussel f6.3," Trianar" f6.3 Krauss," stylor" Roussel f6.3.