Original oil and gas trade magazine vintage ad for BAKER OIL TOOLS INC of Los Angeles, CA. Metal petals basket for successful cementing results. Holds a record for keeping cement above and out of a zone possessing lower formation pressure and higher permeability than is likely to be encountered in any oil well. The basket successfully supported a 640 foot column of cement slurry above the stope, without breakdown or leakage. This unique 1950 oilfield petroleum drilling industry equipment magazine advertisement would display beautifully matted and framed.