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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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thumbnail The Super Union Chart
J. & R. Fleming Ltd
1939
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