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The 'Block' Vision Test
TEST CHARTS
vision test
Theodore Hamblin Ltd
Europe: United Kingdom
1969
card
each card: 124 x 124 mm
2003.127
TEST CHARTS
vision test
Theodore Hamblin Ltd
Europe: United Kingdom
1969
card
each card: 124 x 124 mm
Three square cards bearing on one side a rectangular block (in one, two and three sections respectively). Instructions on the other side. Numbered 1-3. In original plastic wallet.
2003.127
Ex Keeler Collection