Parts of a Durst studio enlarger, also sometimes referred to as a "studio copying camera". There is a triple lens revolving mounting plate with two German Steinheil lenses in situ. Extendable paper bellows are fastened to the mounting plate which has an adjustable pillar/post bracket. The 2 large convex lenses are of different focal lengths: 240/Opt.f=18-21cm, and 130/Opt.f=9-12cm. There are 2 film/negative frames, a backing plate, a mirror, and also an instruction manual entitled, "Laborator 3S Professional Precision Enlarger". The manual has instructions in Italian, German, English, and French. It states that the maximum framing of this model is 13 x 18cm (5" x 7").