eaton caps

[panheaddreamer58]

On my mostly original 50 fl, I been looking for a tall gas cap. One of mine is the short but the other one is the tall. I thought my tall was correct till now. Palmer states that 1941 - 1954 is a tall one (he gives measurements, witch mine meet) with the eaton hallmark  in center of bayonet, an E centered into a outline of a scale weight and vented. Mine is the tall one but it has the word EATON circled and located in the center of bayonet and is vented.  I don't see this combo anywhere in his descriptions of caps. Wondering if maybe non-harley or what. What got me looking again is one on ebay. owner claims it is for 41-54 but its not marked like Palmers discription either. It has EATON circled but on the end of the bayonet.
http://www.ebay.com/itm/Harley-Knucklehead-Panhead-45-in-EATON-gas-Cap-TALL-SKIRT-/360426573907?pt=Motorcycles_Parts_Accessories&vxp=mtr&hash=item53eb191053
I guess i need to look for 2 caps now($$$$$). If i done right a photo of mine follows.Thanks, Jim 

[Hog54]

Well the one in that ebay add isnt a tall one.The one you have is.You can tell by how much space under the knurle.

[panheaddreamer58]

That is true that mine is the tall one, but it is not suppose to say EATON inside a circle in the middle of the bayonet.  I can not find the history of my cap. There is another one eBay now, with the proper markings (by what Palmer says).
http://www.ebay.com/itm/Original-Early-Harley-Knucklehead-Panhead-eaton-tall-GAS-CAP-flathead-45-ul-fl-w-/160721115042?pt=Motorcycles_Parts_Accessories&vxp=mtr&hash=item256bb997a2
No big deal but kinda confusing, when trying to get correct cap. Jim