That is a west coast plate and is original . One of two things it could be your pump could have had the rectangle plates like pictured below. Or it could have had another version of the shield. I think the holes are a little bit different placement, Havent laid mine on top of one another yet.
Dan



Quart and Liter can relidding and dent removal services.PM for detail and pricing.
Collecting Mobil and other graphic quart cans.