My supplying firm of spruce is in Val Di Fiemme (Italy), where I find the same precious wood which Antonio Stradivari from Cremona, at the beginning of the XVIII Century came personally looking for in the fir-woods of Val Di Fiemme Valley for building his famous instruments. Every belly have a number, this number is the some in the certificate of origin. The certificate guarantee the origin of my sound-wood and the rigorous choise of its fibre.