Original vintage Rock Island Oil & Refining Co., Inc. HIGH PRESSURE OIL LINE porcelain enamel metal sign from Duncan, Oklahoma.
This is an authentic old petroleum pipeline warning sign, believed to date from approximately the 1950s–1960s. The exact manufacturing year has not been confirmed.
The sign features dark blue lettering on a white porcelain enamel background and reads:
HIGH PRESSURE OIL LINE
ROCK ISLAND
OIL & REFINING CO., INC.
PHONE AL 5-7151
DUNCAN, OKLA.
The bottom of the sign is marked "STONEHOUSE SIGNS, INC., DENVER," identifying the sign manufacturer.
An interesting historical feature is the old AL 5-7151 telephone number, reflecting the telephone exchange system used during the mid-20th century.
This sign would originally have been used to identify or warn of a high-pressure petroleum pipeline associated with Rock Island Oil & Refining Company in the Duncan, Oklahoma area.
Condition: Original vintage used condition with considerable age-related wear, including rust around the edges and mounting holes, porcelain enamel chipping, surface discoloration, and other signs of outdoor exposure. The lettering remains bold and clearly readable. Please examine all photographs carefully for the exact condition.
The sign has four corner mounting holes and measures approximately 14 inches wide, based on the photograph with the measuring tape. Please refer to the photographs for dimensions.
This is an original vintage industrial petroleum sign, not a modern reproduction.
A desirable piece of Oklahoma oilfield and pipeline history, especially for collectors of vintage porcelain signs, petroleum advertising, Rock Island Oil & Refining memorabilia, and historical oil and gas equipment.
Note: The 1950s–1960s date is an estimate based on the sign's appearance and telephone number format. No exact manufacturing date has been verified.
Quantity: One original porcelain enamel metal sign.
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