Inspired by the dulcimer, the Seagull M4 spruce dulcimer is a portable 4-string diatonic acoustic instrument that's just simply fun to play and hard to put down. The Seagull M4 features a solid spruce top with a "mustache"-style TUSQ bridge, compensated saddle, 3-piece rock maple body with drive-through neck design and tune-up with vintage-style open-geared tuners.