Original oil and gas trade magazine vintage ad for NATIONAL TRANSIT PUMP & MACHINE COMPANY of Oil City, PA. Personal... Pictured is Mr S.B. Daugherty, well known to the natural gas men as a designer, technical gas man and consulting engineer. His working years have been spent in designing gas compressors. We have further strengthened our organization, particularly in the engineering division by placing S. B. Daugherty in full charge of our development and research work. He is well known to natural gas men as a designer, technical gas man and consulting engineer. This unique 1931 old oilfield petroleum well equipment magazine advertisement would display beautifully matted and framed. Nice graphics.