Turner, Ralph Schroeter's Valley, finished illustration
Lot 114
TURNER, RALPH. B.1935. Shaded contour diagram of Schröter's Valley, probably Tucson, AZ, 1974,
US$ 2,000 - 3,000
£1,200 - 1,800
Lot Details
TURNER, RALPH. B.1935.
Shaded contour diagram of Schröter's Valley, probably Tucson, AZ, 1974, ink and white gouache on gray acetate, coordinates and several topographical features labeled, inscribed "Measurements from Relief model _ R. Turner, 1974" at foot, 550 x 1170 mm, matted, framed.

A striking image of this lunar feature, showing Turner's calligraphic skill, which he first developed at college. He has written, "the calligraphy experience lies behind several other things that I got involved with such as the Relief Contour method of expressing topography" (rockcreekexperiment.com).
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  1. Cassandra Hatton
    Specialist - Space History
    Bonhams
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