CBS LABORATORIES TECHNICAL SERIES PROFESSIONAL TEST RECORD Wide Range Pickup Test (10-50,000 Hz) (1966 US stereo LP, a high precision tool designed to assist audio & quality control engineers or test & service technicians with the performanceof their Hi-Fi &/or Broadcast Equipment, picture sleeve. The sleeve shows minimal shelfwear & the vinyl remains near 'as new' with few signs of play - Still in the original opened shrink! STR120)