Original vintage oil and gas magazine ad for SOUTH CHESTER TUBE COMPANY of Chester, PA.  Good Enough methods Are Not Tolerated by Chester.  Chester checks accuracy of threads per inch with a delicate instrument which registers on its clock-like dial, variations of one thousandths of an inch.  Chester Steel Casing, Specialists in Casing for Deep Well Drilling.  Old dated 1927 petroleum industry oil well drilling equipment advertisement.  Would display magnificently matted and framed!

Approximate size  8 x 12 inches