Original vintage oil and gas magazine ad for AMERICAN MANGANESE STEEL COMPANY.  Foundries and Sales Offices in Chicago Heights, IL. New Castle, DE. Oakland and Los Angeles, CA. Denver CO. and St Louis, MO. Distributed by LUCEY PRODUCTS CORP., of Tulsa, OK. and by BUCK & STODDARD of Los Angeles, CA. For The Parts That Wear When Minutes Count AMSCO, The Toughest Steel Known. Manufacturer of Oil Field Steel for Pulleys, Sprockets, Idlers, Bits, Cutters, Drills and parts for HOLT & BEST Tractors. Old 1928 petroleum industry equipment advertisement.