The Master Key Chromatic Pitch Pipe Instrument A440 13 Keys WM Kratt Co USA Made - $15 - (Riverton, IA)
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Posted 1 month ago
You are bidding on used but working master key pitch instrument. It is in its original case with instructions. There is some tape residue on one side which I did not try to clean.
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From ebay.com - 1 month ago