Having measuring range 0-32% sugar scale. Nicely packed in velvet box with zero adjusting screw driver.
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Ground & polished faces, edges ground. Size 50 mm high & 45 mm wide.
Made of optically flat plates cemented together. Dimensions 50 x 50 x 50 mm
Comprising a metal holder with sides grooved to hold the lens or mirror. The holder is finished in matt black & is free standing for bench use, to hold lens 50 mm in diameter.
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