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Objects
The 'Super Union' Astigmatism Chart TEST CHARTS astigmatism test North America: USA 1930s cardboard overall: 800 x 559 mm
The 'Super Union' Astigmatism Chart. Reg no. 3290. Consists of two circular charts of numbered dots in a purple-covered fold-out board with clasp.
1999.821
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The Super Union Chart J. & R. Fleming Ltd 1939 View