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MANUFACTURING AND DISPENSING EQUIPMENT
overall: 100 x 270 mm
Promotional optician's rule and centration chart. Plasticised white card featuring on obverse: p.d. and bridge scales plus two schematic diagrams of a 'Varilux' progressive lens. On reverse: one schematic diagrams of a 'Varilux' progressive lens plus diagram of human reading position.
Gift of Mr Brian Mitchell, 2004