Original oil and gas trade magazine vintage ad for TIMKEN ROLLER BEARING COMPANY, of Canton, OH. Portable Rig Drills 4000 Feet with 3.5" Pipe Timken Bearings Reduce Gear Wear. Mayhew Supply Company, mounts the transfer assembly bevel pinion and bevel gear shafts of its Model 3000 Portable Drilling Rig on Timken Bearings to reduce wear, assure long life and trouble-free operation. Unique 1955 old petroleum oilfield drilling industry magazine advertisement. Approximate size 9 x 12 inches.