The Antique M. Hohner Marine Band Harmonica 1896 Model A440 Hertz, made in Germany in the 1940s, is a vintage diatonic harmonica in the key of D. This classic instrument, renowned for its rich sound and craftsmanship, embodies the folk and world music styles of the era. The Hohner brand is well-known for producing high-quality musical instruments, and this harmonica is a cherished piece for collectors and musicians alike. This is a 10-hole diatonic harmonica. Play great very chrisp sounds. Rare find in this condition.