Original oil and gas trade magazine vintage ad for JOHNSTON TESTERS, INC. of Houston, TX. Looking for ways to Reduce Completion and Workover Costs? The FAS Tool can help you, Frac-Acidize Squeeze. Jobs that required multiple trips can now be done on a single trip, saving hours of costly rig time. This unique 1962 old oilfield petroleum drilling technical magazine advertisement would display beautifully matted and framed. Great graphics. Two page gatefold advertisement.