Original vintage oil and gas magazine ad, ALLIS-CHALMERS of Milwaukee, WI. Tractor Division.  Allis-Chalmers Model D Motor Grader Line.  Diesel or Gasoline Engines.  POWER-CRATER is an Allis-Chalmers trademark. Old 1955 petroleum industry oil field equipment advertisement.

On the reverse side (see Additional Images tab) is JONES AND LAUGHLIN STEEL CORPORATION of Tulsa, OK.  J and L Supply Division.  Elbowroom by Midwest.  Midwest originated and developed the Long Tangent Elbow, the Reducing Elbows, Saddle, Sleeve, Shaped Nipple, and Lap Joint Stub End with large radius and heavy forged lap. Old 1955 petroleum  industry advertisement.