Extreme Grease Filled Die?

I also considered a grease strike that was also weakly-struck (I've encountered at least one example). But that still wouldn't explain the unequal strength of the two design rims or the areas of well-struck design on either face.

After further thought, I'm going to change my tentative diagnosis to a greasy weak strike. The reason is that the edge of the coin is not flat and tall but is, instead, rounded-looking and thin. The latter is consistent with a weak strike.

I now suspect that deposits of grease were largely or exclusively restricted to the obverse die. The grease forced coin metal laterally into the rim gutter, producing a respectable design rim on the obverse face. At the same time, the extra pressure generated by the localized deposits of grease was more evenly distributed through the body of the planchet to the reverse face so that there wasn't as much pressure applied to the periphery of that face. That's why the reverse design rim didn't strike up nearly as well.

Yes, very much so.

yes, thank you Cascade and thank you for the heads up. I removed my email.

That's why this forum is so awesome-so much help and expert knowledge,congrats on an interesting find keep us posted on this one