John Walker - Blued Steel Tuning Fork High-Quality x2 (19238)

Musical Tuning Forks #1 - A440Hz John Walker Tuning Fork High-Quality A440 - Tuning Fork Delivering a Long, Pure Tone In The A Note of A440Hz, The Standard Orchestra Pitch. E329.6Hz John Walker Tuning Fork – E & E# Frequencies - For Acoustic ,Semi Acoustic and Solid (Electric Guitars) Made in England.

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