Cohen-1 variety, considered to be Rarity-5 in the proof format seen here.

While this piece is designated as merely ‘BN’ on the holder, in our view it should say, “Hard mirror surfaces with medium brown devices and delightful gold, rose and violet toning which come alive as you twirl this coin in the light”.  But evidently that would not fit on the PCGS tag.

Note that this coin has been verified by CAC.

This coin is from the CRO archives and is not currently available for sale.