MusEYEum Online Catalogue

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Turville Distance Balance Unit
test chart
Europe: United Kingdom
20th c.
overall: 690 x 620 mm

Universal test chart with Turville Distance Balance Unit (TDB) mountings. Wooden construction, painted white with black lettering. 'Square' wall-mounted board with variable letter disc visible through an aperture and projecting side wings bearing fully-rotatable auxiliary charts (letters and balance tests). Two brass brackets.


Gift of Audrey I. Smith, 2001

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20th c.

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