TM Depot Special Scale Changing Harmonium

Technical specification: seven folded below.three set reeds.coupling system.playing octave 3 3/4.portable version.five standing notes.nine hinges.international pitch ( a = 440 hz ).premier reeds.bermatic seasoned teak wood.free cover.special features: coupling system :- this system provides a unique facility. While you are playing a particular note the sound of the same note of lower octave will set it automatically.