Double Ru (Annaziska Scales)

this one is not for sell but it just a result of temperature treatment research of my material. also this is just unfinished prototype, because the bottom side(the low notes) it still used an old material. the top side(high notes) is a new material. the Double Ru (Annaziska Scales) Top side (A Bb C D E F A) Bottom Side (D A D)