The one on the Bottom is the Wenge Neck Thru. I think only 2 were ever made. At the time of the pic she had a set of Roto Nexus coated strings on. Since then, they've been changed to Optima 24 KT Uniques. Currently prefer the Optima 24 KT Uniques on all my fretted babies. The Blue one is frettless and has a set of La Bella Purple Haze Tape wounds.