Vintage magazine ad for BIGNALL & KEELER MACHINE WORKSof the N.O. Nelson Manufacturing Company of Edwardsville, IL, . Manufacturers of pipe threading equipment. Old 1928 petroleum drilling equipment advertisement.
Original vintage oil and gas magazine ad BIGNALL & KEELER MACHINE WORKS, of the N. O. NELSON MANUFACTURING CO., of Edwardsville, IL. Pictured is: the No. 20 Duplex machine wi..