Thomann Planetary Tuning Fork Saturn, gold plated - suitable for allergy sufferers, extra long handle for better feel and control, Description: Duration of one orbital period around the sun; Position to sun: 6st planet; Orbital period in years: 29.48; Orbital period in days: 10759.21; Orbital period in seconds: 929595744; Frequency calculation: 1/929595744 sec. = 1.07574x10 pot. -9 Hz, (1.07574x10 pot. -9 Hz x 2) 2 pot. 36 = 147.85 Hz ; Frequency: 147.85 Hz (= 37. Octave); Tone: D3; Shifted 440 Hz standard-pitch: A4/a' = 403,05 Hz; Made in Germany