Sinclair Oil Corporation, founded in 1916, was known for its distinctive dinosaur logo and its extensive network of service stations across the United States. Road maps were a common promotional item distributed at Sinclair stations, encouraging motorists to purchase their gasoline and oil. These maps often featured colorful illustrations and detailed information about routes, points of interest, and Sinclair's service locations. 

This particular map, published in 1933, provides a snapshot of New Jersey's roadways during the early automotive era. The cover art depicts a typical Sinclair station of the time, complete with vintage automobiles and the company's branding. Such maps are now sought after by collectors of automobilia and those interested in the history of road travel.