The early history of Ethyl will be in an upcoming feature story in PCM, but after a brief withdrawal from the marketplace in 1925 and part of 1926, sales of Ethyl gasoline was restored in the summer of 1926, with several restrictions, including the posting of some sort of warning that the gasoline contained tetraethyl lead. Several early signs were unique to a brand, but standardized "Contains Lead" signs were available within a short time of the reintroduction. There are numerous variations.

Wayne Henderson
Petroleum Collectibles Monthly
Kernersville, NC