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set of Freeman-Hamblin crossed cylinders
OPTOMETRIC INSTRUMENTS
crossed cylinder
Hamblin Instruments
Europe: United Kingdom
1986
plastic
overall: 120 x 9 mm
2000.312
OPTOMETRIC INSTRUMENTS
crossed cylinder
Hamblin Instruments
Europe: United Kingdom
1986
plastic
overall: 120 x 9 mm
Set of colour-coded crossed cylinders. Four binocular examples and seven single examples (including four prisms) with handles.
2000.312
Gift of Mr Philip Freeman, FCOptom, 2000