The Vintage John Walker Sheffield Tuning Fork is a classic piece of musical equipment crafted in the United Kingdom. This particular tuning fork, with a pitch of A 440 Hz, is designed for use with violins and is made of durable blued steel. The brand's reputation for producing high-quality musical instruments is evident in this timeless piece, making it a valuable addition to any musician's collection. Additionally, by choosing this tuning fork, you are supporting a charity as a portion of the proceeds goes towards a worthy cause.