Ekco-Scophony ES 104 (1938). 20 x 24 inch screen. Had 39 tubes (valves) and consumed 1000 watts. The set was mechanical, using a mirror drum 12 inches in diameter, a miniature polygon of stainless steel rotating at 30,375 rpm, with a 300 watt mercury lamp. For more details, see Peter Yanczer's Scophony page. Original price 220 Gns.