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MANUFACTURING AND DISPENSING EQUIPMENT
Europe: United Kingdom
Early 21st c.
plastic; metal; foam
case: 16 mm x 202 mm x 145 mm; lens: 70 mm
Demonstration set comprising a single round lens, half of its surface specially coated, contained within a foam-lined grey metal hinged-lid case. Together with a black marker pen and an explanatory card printed in four languages, English, Russian, French, Spanish.
Gift of Mr John Dixon Salt FCOptom, 2010