Utilissimo disco stroboscopico in alluminio originale THORENS cps 50 & 60 Hz (1958) per verificare le tre corrette velocità (33 1/3, 45 e 78 RPM) dei giradischi vintage in eccellenti condizioni.
A gem near mint condition THORENS strobe-scope turntable calibration disc, made in Switzerland (1958)
The disc is made of aluminum and has markings for 50/60 cps (EUR & US)
voltages and 78, 45, 33 1/3 speeds.
