VINTAGE COPPER PRINTING PLATE PRINTERS BLOCK - SONORA Phonograph. The Sonora Phonograph Company was in operation from around 1913 to 1920. Measures approximately 12 inches high by 8.5 inches wide and weighs approximately 2 lbs 3 ozs. Heavy metal construction, a magnet will NOT stick to it. Has a thin copper wire run through a couple of small holes, probably for hanging for storage. See photos. Let me know if you have any questions.