Includes four Sinclair Oil issued certificates and two from Sinclair Consolidated Oil Corporation. The company was founded by Harry Sinclair. In 1919, Mr. Sinclair restructured Sinclair Oil and Refining Corp. and Sinclair Gulf Corp. into Sinclair Consolidated Oil Corp., with capital assets of more than $178 million [x=#241/] a truly integrated structure that encompassed every process of the industry, from crude oil production to marketing, both at home and abroad. The Sinclair domain was now four times the size of the original company (sinclairoil.com). In the 1920's, the company introduced the first high octane gasoline (premium). Advertising writers first introduced Sinclair[x=#237/]s famous green Dino in 1930, to promote Wellsville-refined lubricants [x=#241/] derived from Pennsylvania grade crudes laid down during the Mesozoic Era, when dinosaurs roamed the earth. Sinclair acquired the refinery in Parco, Wyoming, during the Depression. On Jan. 1, 1942, the town population voted to change its name to Sinclair, and to this day, the town retains its name and Sinclair still runs the refinery. In 1969, ARCO acquired the Sinclair Oil Company. All of the certificates are punch canceled. Issued between 1930 and 1968 (information from sinclairoil.com). Printed by three different banknote companies including ABN, Columbian and Security Columbian.Date: Country (if not USA): State: CaliforniaCity: Provenance: Ken Prag Collection