3G740 Esteve Special Model octave guitar CC-60-AL Salvador Cortez Solid Top Concert Series alto guitar CC-60-BA Salvador Cortez Solid Top Concert Series 6-string bass guitar CS-60-BA Salvador Cortez Solid Top Concert Series 6-string bass guitar CS-60-CB Salvador Cortez Solid Top Concert Series 6-string contra bass guitar B/CS60CB-00 Salvador Cortez B-stock