An antique brass Watson Service Petrological Microscope c.1920, engraved to the body tube “SERVICE” PETROLOGICAL W Watson & Sons Ltd, London 31156′ the microscope on black lacquered stand, plano-concave mirror, substage polariser, rotating stage (cracked with losses) , body with slide in/out polariser, in it’s polished wooden case. Watson’s “Service” series was highly regarded for its robust build and reliability. The petrological version included accessories such as rotating stages, polarising components, and optical features suited for geology and mineralogy.
The
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