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An 'open reel' tape recorder circa 1957. They weighed a ton and on domestic machines like this the reels could be up to 7" in diameter holding 1800 feet of tape with recording speeds of 3.75 inches per second (96 minutes) or 7.5 ips (48 minutes). I had endless fun with a Telefunken machine recording from the radio, records and with a microphone. You could also overdub by bypassing the erase-before-record head.