Both Beovision 900 and Beovision 901 receivers were 20″ black & white TVs of the early 1970s.
Beovision 900 Specifications
Type: 3803
Picture tube: 50cm
Power output: 5 W
Distortion: less than 1 % at 500 mW / 1000 Hz
Speaker: 1 x 800-ohm oval speaker
Power supply: 220 V
Power consumption: 100 W
Dimensions W x H x D: 49.3 x 36.8 x 33.6cm
Weight: 16 kg