Facsimile of Colt Navy revolver, serial no. 7581, barrel length 218 mm / 8.6 in and calibre 9 mm / 0.4 in Facsimile of Colt Navy Revolver
Working model of a steam engine fitted with Corliss Valve Gear, 1899 with electric motor, in glazed case, scale 1:12. Horizontal Steam Engine with Corliss Valve Gear, 1899 1899
Stage tweezers, for use with Cuff microscope, by Dollond, London, 1750-1800. Stage Tweezers for Cuff Microscope, Dollond, London 1751-1800