Electric Guitar (Black & White) - BrickForge Part for LEGO Minifigures – The Brick Show Shop
BrickLink - Part 17356pb02 : LEGO Minifigure, Utensil Guitar Electric 'ML' Type with Pearl Dark Gray Pickguard and Silver Strings, Bridge and Whammy Bar Pattern [Minifigure, Utensil, Decorated] - BrickLink Reference Catalog