WAUKESHA MOTOR COMPANY 1955 IDECO Super 7-11 drilling power vintage ad

Original vintage oil and gas magazine ad, WAUKESHA MOTOR COMPANY of Waukesha, WI.  On Location for Durham Drilling Company, West Texas - this Super 7-11 rig has three LRZBU Waukesha Gas Power Units.  IDECO Super 7-11. Old 1955 petroleum drilling power industry advertisement. 

On the reverse side (see Additional Images tab) is  JOHNSTON TESTERS of Houston, TX. Los Angeles, CA. and Calgary, Canada.  First In Drill Stem Testing.  Double Shut-In Pressure Readings testing tools.  Johnston Testers, Formation and Casing Testing.   Old 1955 petroleum  industry advertisement.

Approximate size  9 x 12 inches.