Original 1943 electrical trade vintage ad for SOLA ELECTRIC COMPANY.  Main office and plant was located at 2525 Clybourn Avenue, Chicago, IL.

Manufacturers of Constant Voltage Transformers.

Billionettes.

Not twin, triplets, quintuplets, but billionettes, each the "spittin' image" of the one that proceeded. That is the rigid uniformity required of American arms and ammunition, a requirement which demands all the "deadly precision" industry can develop. Maintenance of production schedules and uniform accuracy in products is a difficult assignment these days. Overloaded supply lines deliver unreliable power voltages. During periods of peak loads, voltages may vary as much as 30%. Unexpected surges cause unsteady operation of precision machines and irreparable damage to delicate instruments and tubes.

Unbound from a 1943 electrical engineering magazine, this unique old one-page advertisement would display beautifully matted and framed. Nice graphics. World War 2 propaganda. A fabulous addition to your retro electrical library.