Original oil and gas trade magazine vintage ad for EMSCO DERRICK & EQUIPMENT COMPANY, of Los Angeles, CA and Houston, TX. New York office at 150 Broadway. Factory Branch in Tulsa, OK. EMSCO Unitary Machine Support, Type 7-D All Steel. Positive, Unyielding Rigidity. Unique 1928 old oilfield petroleum industry magazine advertisement. The bottom right corner has a one inch chip. Would matte, frame and display nicely! Nice graphics.