Vintage Master Key Chromatic Pitch Instrument A-440 13 Keys
Gently used, case and device both show light wear, no major flaws
Includes original red plastic case with blue interior lining
Made in USA by Wm. Kratt Company
Round black pitch wheel with engraved white key markings for 13 chromatic notes
Easy-to-read labels for all sharp and flat notes, arrow indicators
Designed for use in tuning musical instruments or for music education
Displays 'The Master Key' brand on exterior case
Classic analog pitch finder and reference tool
Great collectible for musicians, music students, or vintage instrument lovers