'Van Heurck Grand Model' monocular microscope by W. Watson and Sons

'Bactil' research microscope

Camera lucida

"Service" Model microscope no.27178 by W. Watson and Sons Ltd.

Spectrometer eye piece mount flange and retaining bracket

Polarizing microscope by W. Watson and Sons

Watson Holos paraboloid system, c. 1930

Stage, pillar and inclining prism

Linear brush electrode

Microscope, made by Watson

Hammer break interrupter

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