Mariner 6, Mars, a mosaic of four images taken south of the Martian equator, July, 1969,

covering an area roughly 450 miles deep and 2,500 miles long, taken at 84-second intervals as Mariner 6 flew eastward,

vintage gelatin silver print, 9.5 x 24 cm. (3 3/4 x 9 1/2 in.), blue NASA caption numbered 69-H-1404, verso