Vintage US Instrument Corp A-555 Sound Powered Telephone Handsets Lot of 2 wheel hub Have many other books and

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Vintage US Instrument Corp A-555 Sound Powered Telephone Handsets Lot of 2 wheel hub Have many other books andVintage US Instrument Corp A 555 Sound Powered Telephone Handsets Lot of 2 For sale is a rare lot of two vintage sound powered telephone handsets manufactured by the U. S. Instrument Corp. This specific model, designated as A 555, dates back to the mid 20th century (circa 1940s1950s) and was heavily relied upon for dependable, battery free communication within military and naval defense settings. Both pieces feature their authentic, heavy duty black