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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: 5218 × 4019 px | 60.0 MB
Print size: 44.2 × 34.0 cm | 2054.3 × 1582.3 in (300 dpi)