SOLD at Norm's Rare Guitars 2025 Asher Electro Sonic Master Series - Spanish Cedar with Flame Koa top $12,000.00Product This is a one off Electro Sonic Master Series that is so beautiful, you wont want to play it but you should! Handcrafted by Master Luthier Bill Asher in Los Angeles, this guitar has a tone and feel that sets it apart you won't want to put it down. Specifications Model: Electro Sonic, Master Series Serial Number: #1382 Body Wood: Spanish Cedar Top Wood: Super flamey Hawaiian Koa Neck Wood: Quarter sawn Spanish Cedar Neck Shape: Deep D (. 98 1.