My 1927 Victrola 10-50 acoustic orthophonic phonograph. First consumer automatic record changer. Electricity is only used to run the platter and changer - sound is reproduced all mechanically thru the huge wooden horn on right side. I restored the reproducer and changer to working order with a few new parts. 300 lbs of mahogany and heavy metal. Okay so it's not stereo but in its day it was definitely a high-end sound system.
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