I wish I could post a picture of the "baseball" visor, this one isn't like the 54/55 1st, I have that one on both my '54 3100 and '54 Bel Air sport coupe, I don't see a model # on it either AND I don't have a '51 accessory manual yet, I agree that the fulton complements the split windshield nicely, but this "baseball" one is for split windows also, it may be an aftermarket thing but both guy's, lowrider dudes, say that it is GM. Maybe for cars? Thanks for the inputs, keep 'em comin bruddas!