Watson Royal - circa 1910

A description of the Royal model from the Watson sales catalog:   "For high-class practical work, with absolute rigidity, in a convenient size, this instrument is unexcelled, for it combines all those working qualities which have gained so high reputation for the Van Heurck Microscope, but in a more compact form and at a lower cost."

 The microscope is signed on the stage, "W. Watson & Sons, 313 High Holborn, London, 12642", the serial number dating the instrument to circa 1910.  The main focus and first stage draw tube is by rack and pinion.  Sub-stage fine control and fine focus is by thumbwheel-lever, and the two draw tubes have scales for ease of setting tube length.  Tube length is adjustable to accommodate both the short tube Continental and long tube English objectives.  The centering sub-stage has thumbwheel controlled rack & pinion adjustment and holds a lever-operated iris and swing-out filter holder.  The plano-convex mirror is on a swing-out limb for oblique illumination.  The optical system is comprised of a triple nosepiece and three original Watson objectives with matching signed brass canisters: a 2/3", 1/6", and 1/12" oil immersion. The lenses are in superb condition. Eyepieces include a 2 (6x), 4 (10x,) and a Holos 7.  The sub-stage accessories has a universal condenser, and an additional Nelson's dark ground lens.  The microscope is finished in lacquered brass with black japanned brass.  The original mahogany case has a metal carry handle, lock and key.  The microscope and case are in excellent working condition, mechanically and optically, with all original finishes.  It is as close to the mint as could ever be found in an instrument of this era. 

Item 1493

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