I have a few Sony AC replacement power cords; they are from "Tenma" they are marked as "Sony type replacement power cord 18 ga. 6FT/ #23-050". They are rectangle approx. 9/16 X 9/16 inch with an extruding key, and four (4) round holes 2 of which are conductors and 2 are empty. I want to offer these for sale, but I don’t know what model they work with. Most of the stuff that came along with them was from the late1960’s thru mid 1980’s I can send pictures if you like. Any help that you may be able to provide will be greatly appreciated. Respectful, Art. Billings

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