Very nice and original pocket knife, manufactured by Rud Dultgen - Solingen, Germany at the beginning of the 20th century, brass scales with acid engravings with arabic design, very fashionable at that time with a black enamelled background, it has the advertising of the laboratory Bayer, has 3 blades, nickeled carbon steel, in very good condition, only a few small dents, beautiful collectible piece !!, measures 8.2 cm closed (3.28 in), main blade 6.5 cm (2, 6 in)