Wittner   tuning fork, 4,5 mm., round, nickel plated, e1-329.6 Hz.

Wittner   tuning fork, 4,5 mm., round, nickel plated, g1-392.0 Hz.

Wittner   tuning fork, 4,5 mm., round, nickel plated, g#1-415.3 Hz.

Wittner   tuning fork, 4,5mm., round, nickel plated, 432.0 Hz.

Wittner   tuning fork, 4,5 mm., round, nickel plated, a1-440.0 Hz.

Wittner   tuning fork, 4,5 mm., round, nickel plated, a1-442.0 Hz.

Wittner   tuning fork, 4,5 mm., round, nickel plated, a#1-466.2 Hz.

Wittner   tuning fork, 4,5 mm., round, nickel plated, c1-523.3 Hz.