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Two French brass lenses from the 1860/70’s : (1) 'Derogy' with rack and pinion focusing and a set of 5 circular apertures, for easy changing of the aperture the upper section of the lens is mounted with a bayonet, brass lid with wooden knob, serial number 11,148, condition B, height 26cm, (2) 'Berthiot No7' very well-preserved lens for use with Waterhouse stops, condition B (2)