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Title: Elisha Gray's telephone.
Caption: Elisha Gray's telephone, as described in his patent caveat of 14th February 1876. The Speaking Telephone, New York, 1879.
Credit: Album / Universal Images Group / Universal History Archive
Image size: 5666 × 3701 px | 60.0 MB
Print size: 48.0 × 31.3 cm | 2230.7 × 1457.1 in (300 dpi)