Blued Steel. I'm a guitarist with 20+ years experience. Then look no further. Tuned at 20ºC.
John Walker Blued Steel Guitar Tuning Fork X 3 And 1 Standard Tuning Fork
Vintage John Walker Blued Steel Tuning Fork Music Tool Made In England
John Walker Professional Grade Piano Tuning Fork 440 A Blued Steel New S8316
John Walker Tuning Fork A415 Baroque
A440 John Walker Tuning Fork Manufactured by Ragg Tuning Forks in Sheffield, England. Standard Orchestra Pitch A440Hz. Tuning Fork For Tuning Violins, Pianos, Guitars and Other Musical Instruments
John Walker Tuning Fork A430
