Original oil and gas trade magazine vintage ad for THE COOPER-BESSEMER CORPORATION of Mount Vernon, OH. How to Spot the Winner in the Big Horsepower Class. Look at the performance records of Cooper-Bessemer LSV engines, like those above, and you'll see why there are twice as many of these power giants than all similar competitive units combined. Compressors and engines of all types. This unique 1962 old petroleum industry equipment magazine advertisement would display beautifully matted and framed.