tuning fork, 4x8 mm., square, nickel plated, d1-293.67 Hz.
tuning fork, 4x8 mm., square, nickel plated, f1-349.23 Hz.
tuning fork, 4x8 mm., square, nickel plated, g#1-415.30 Hz.
tuning fork, 4x8 mm., square, nickel plated, b1-493.88 Hz.
tuning fork, 4x8 mm., square, nickel plated, c2-523.25 Hz.
plastic sleeve for 921-922 tuning forks
