According to the seller, this vintage device on eBay is “a one-of-a-kind, hand-built prototype AM-FM 12-transistor “stereo” tuner made by Sony Corporation in 1958.” Auction page. Click here for first picture in gallery.

The purchaser of this item will receive a notarized letter of provenance documenting the complete history involved with the origin of this Sony tuner…displayed in the importers trade-show booth at the 1958 “may parts” show in Chicago, IL.

[via eBay]

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