Mint, Perfect, Open Box with Full Washburn Warranty The M3SW is one of our most popular mandolins. This F Style all sold wood instrument features a solid carved European spruce top, and solid carved Canadian maple back and sides and is perfect for bluegrass and Americana styles of music. Washburn has been building mandolins since the late 1800s. Whether you’re a bluegrass, Celtic or rock player, see how the addition of a mandolin can broaden your sonic pallet and add a new dimension to your music. For traditionalists, you’ll find all the tone & projection you’d expect from our world class instruments.