Vintage Kratt Master Key Chromatic Music Pitch Instrument w/Box
William Kratt "Master Key" chromatic pitch instrument. 13 keys, model A-440, patented 1931. Hinged cardboard case with instructions printed inside, measures 2.75" square x .75" thick. Round instrument has a few small rust spots on the unpainted side, otherwise in good condition. Sold as is. Inglenook Antiques...Established 1989.
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