Meinl Planetary Tuned Earth Tuning Fork

Meinl Tuning Fork Earth TF-E, Planet Tuning Fork, Note: C#3, Determination of frequency: Duration of one orbit around the sun (corresponds to the calendar year) OM tone, position from the sun: 3rd planet, Orbital period in years: 1, Orbital period in days: 365, Round trip time in seconds: 31556925,9747, Frequency calculation: 1 / 31556925,9747 sec = 3.1689 \* 10^-8 Hz, (3.1689 \* 10^-8 Hz x 2) 2^31 = 136.10 Hz, Frequency: 136.10 Hz (32th octave), Shifted standard tuning 440 Hz: A4 / a' = 432.09 Hz, Made in Germany