Yamaha FG720S Solid Top Acoustic Guitar - Mahogany, Brown Sunburst Solid Sitka Spruce Top Eastern Mahogany Back/Sides Nato Neck Rosewood Fingerboard/Bridge Brown Sunburst Solid Sitka Spruce Top Eastern Mahogany Back/Sides Nato Neck. Rosewood Fingerboard/Bridge Brown Sunburst Eastern Mahogany Back/Sides, Nato Neck Solid Sitka Spruce Top, eastern mahogany back and sides.