1970

TwinSonic
Mfg; Federal Sign & Signal
Model 12 54" wide
Model 12S 43 1/2" wide
Model CTS-1  California Lights
Size; 9 1/8" deep, 6 1/2" high, weight 33 lbs.
Single motor-chain driven lamps.
Original cost $250.00
First date available;  1970