Preowned John Walker Tuning Fork A Standard Frequency 440Hz

This Preowned John Walker Tuning Fork A Standard Frequency 440Hz is in very good condition.

Handmade from hardened tempered blued steel by the renowned manufacturer, John Walker, whom "Tune at 20°C to achieve pure notes of strong duration."

 'A' standard has a frequency of 440Hz (general tuning standard for musical pitch).

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