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Abbe Refractometer, about 1956

Abbe Refractometer, about 1956

1956
Prestwich fluid gauge comparator, c1917.

Prestwich fluid gauge comparator, c1917.

1916-1919
Sigma Instruments thickness gauge, 1951 stored in a box and fitted with a inspection fitting for measuring screw thread acceptibility. Purchased from Plessey Records in 1951.

Sigma Instruments thickness gauge

1951
Optical lever type workshop comparator measuring machine, with extra daylight projector giving a 1000 : 1 magnification at the scale.

Optical lever type workshop comparator measuring machine

circa 1920
Tomlinson surface finish analyser, made by Baty & Co.1951.

Tomlinson surface finish analyser

1939-1951
Demountable diffuser unit / ground glass viewer for use with the Zeiss tool room microscope

Demountable diffuser unit

1944
Toolroom microscope made by Zeiss; 1944.

Toolroom microscope made by Zeiss; 1944.

1944
Detachable lamp unit with 100 watt 12 v. bulb magnifying lens and spirit filled level with badly deteriorated electrical lead for use with the Zeiss toolroom microc.

Detachable lamp unit

1944