1951 Big Nickel Variety

@DBM:
Sorry I'm almost 6 months late, I stumbled upon this topic while doing research.

So, to my knowledge no struck on plastic blanks are known to have been used for this medal. However, it still happens on occasion that I discover compositions for the park medals that were previously unknown from the existing literature on the subject.

But, in this case, this would be surprising. Since in my opinion your medal has all the characteristics of the aluminium version, and the same goes for the pair of dies used to strike this one.

A weight of "almost" 7g is certainly heavier than the standard, but it remains within the limits of what I have been able to observe over the years for the aluminum version. On the other hand, the 40mm diameter is very intriguing. Is that an accurate measurement?

However, without having the medal in my hands, it seems very difficult to be categorical.

But if you want to confirm, a density test should remove any doubt (If you go for it, don't hesitate to share the result).