Maker's Name: 
Philips 22VP831 05

LaserDisc player used to play lecture demonstration videos.

The LaserDisc was the first commercial optical disc storage medium, beginning in 1978, and was the forerunner of CDs, DVDs and Blu-ray. The discs were  300 mm in diameter and were read by a 780nm diode laser interrogating a string of pits and lands in the reflecting surface, with an analogue coding system( The discs had a playing capacity of 60 minutes per side.