Sigma 000MC-1STE-BK Black Electro Acoustic Guitar. The Sigma 000MC-1STE Electro Acoustic Guitar features a solid sitka spruce top, mahogany back and sides and Fishman Isys+ electronics. A bone nut and saddle adds to the quality components used. The Sigma Guitar range of acoustics are superbly built instruments delivering excellent tone and unbelievable value for money. 000 size acoustic Fishman Isys+ electronics Solid sitka spruce top Mahogany back and sides Bone nut and saddle Indian Rosewood fingerboard 25.4" scale Chrome, diecast tuning machine heads