GEORG BOLIN. alto guitar, "Hanna", made in Stockholm 25/4 1986, 11 strings, inside with label and signature Georg Bolin. Other - Musical instruments - Auctionet
Heikki Rousu - 2019 11-String at SICCAS GUITARS - The world's finest guitars in one place
Alto Guitar For Sale - Rare Made In Japan Teruyoshi Kayama hand made Niibori Classical Acoustic Alto Guitar, Hobbies & Toys, Music & Media, Musical Instruments on Carousell
2011 Henrik Jansson 11-string Alto Guitar | Reverb Australia