Gibson Custom Slash 1966 EDS-1275 Doubleneck Replica, Aged Black, Signed by Slash Overview.A truly iconic guitar from one of the most iconic guitarists in rock, the Gibson Custom Slash 1966 EDS-1275 is signed and numbered by the man himself. Slash's rise to rock royalty featured a variety of iconic Gibson models, but it was the 1966 EDS-1275 Doubleneck that both diversified his sound and solidified his guitar-god aesthetic. He bought it from a small music store in Indiana in 1990 and put it into rotation almost immediately.