Hello Guys!
The Mobil black border pump plates come from the General gasoline territory on the west Coast. These shields also have a sharper "hook" on the lower sides than any other shields and also they have the same size Pegasus on both Mobilgas and Mobilgas special plates (the leg protrude into the text as Dwaine said).

The blue border shields (made by Ingram Richardson) were used on the eastcoast and in most parts of the US between 1946-53/54 when they were replaced by the thin white/blue border (as on the Diesel plate in this post) that was used until 1961. In 62 the new rectangular plate with the new wider shield came to use and the gasoline names were changed to Premium and Regular.

There is also another type of shield that was used in the Magnolia territories. It has a wider white edge with a very thin blue border. They are a little larger than the above - 12X13"
regards,
Claes
ps it is impossible to date this shield to a specific year as it does not have a date mark on it. This design was used between 1946 and 1962. ds
[This message has been edited by fast66 (edited 11-02-2004).]

[This message has been edited by fast66 (edited 11-02-2004).]