Quote from TNG on February 23, 2020, 1:27 pm

It's an easy one to find as there were 10,000 pieces and all sold out at $3.50 in August 1959. But since I have one and don't find one on this wonderful website, it deserves a post.

Congressional national medals permitted striking of additional numbers, but Governor Steve McNichols personally advised on April 11, 1960, that no more medals would be struck.

I found mine with the envelope and literature that these were issued with. Mine does look better than my images.