The Hohner Echo Harp double-sided tremolo harmonica is a vintage musical instrument made in Germany by the renowned brand Hohner. This particular harmonica features a C key and produces a unique tremolo sound on both sides, making it a versatile and sought-after choice for folk and world music enthusiasts. With its classic design and high-quality craftsmanship, this harmonica is sure to impress both musicians and collectors alike for its distinctive sound and vintage charm.