VARIOUS EDUCATIONAL Frequency Record Vertical (1960 UK stereo LP, divided into 'Constant Frequency Bands' & 'Gliding Tone' to judge frequency velocity & detection of resonances on your home or studio console, with charts & tables on the back of the front laminated flipback sleeve. The sleeve has some wear around the edges, forgiveable with age, yet the vinyl is clean with few signs of play TCS105)