A stereographic image of an American observation... Lot 6
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A stereographic image of an American observation balloon in use during WW1. The verso bears a lengthy and evocative description of the balloon and its use as a tool to monitor German assets and movements. Stereograph images are meant to be used with a stereoscope, a device in which you slot a stereograph and then hold up to your eyes almost like a pair of binoculars, giving the image a sort of three-dimensional effect because of the slight difference in the angle of each photograph.
Dimensions: 3 1/2 x 7 1/4 in., (6.4 x 18.4 cm.)
Very good overall, board slightly warped, some minor discoloration towards top of image.
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