Original oil and gas trade magazine vintage ad for MISSION MANUFACTURING COMPANY of Houston, TX. Automatically lubricated valves never get too hungry to work. Line pressure forces lubricant from reservoirs to sealing grooves. As long as lube remains in the reservoirs, a perfect seal is assured in high or low pressure, gas or liquid, regardless of which end of the valve may be downstream. This unique 1953 old oilfield petroleum well industry magazine advertisement would display beautifully matted and framed. Two page gatefold advertisement.