41 treble keys
13 treble registers + Master register
7 bass registers
PAOLO SOPRANI Professional IV accordion of the well-known Italian instrument makers, which has seen little use. The accordion has LMMH tuning (Piccolo register) 41 keys and 120 basses. 13+ Master registers on the right hand and 7 registers on the bass.
Basses have 5 choirs, one of which has an L-shaped sound chamber(cassotto)
The set includes a new instrument box and padded shoulder straps.