Original old commercial fleet trade magazine vintage ad INTERNATIONAL HARVESTER COMPANY of Chicago, IL.  Explore oilfield with heavy-duty truck. For the stamina to get a heavy shot hole rig into position and for the tireless power-train to drive a bit through bedrock, model RF-190 six-wheeler trucks can't be beat.  Heavy, varying or surging loads are all in a day's work for its oil-filed-proved clutch and transmission.  This 1962 two page gatefold oil and gas transportation industry advertisement would display beautifully matted and framed.