Insight On Xxi Montreal Skyline Coin Embedded In Diamond Poly/Plastic

The coin is from the 1976 Montreal Olympics series which were issued individually and in sets. This is the $10 Skyline coin from Series I (0.925 silver).

I have not seen this type of packaging. Maybe done post-release from the mint?

Thanks Everyone so far and in Future on this one - it came with an almost complete set of every type of Montreal Olympics Coin collectables, however this one's had me stumped. If it was Glass instead of some sort of plastic, so probably not a gift for the "Judges" - I can dream right - LOL. No anything of esteem in the 1970's would have been glass and hallmarked.

Do you ever notice when your tight on funds, every piece of the items you collect is special and must be worth a lot. LOL

I had a nugget ring that some "really smart person" had mounted a 1929 Indian Head $5, right in the middle and it was mounted in a way as not to be removed. In convincing myself that who but a famous gambler would do something so cocky/stupid, I had it pegged at being owned by "Jimmy the Greek" and worth upwards of $100K - actual value of the coin, LOL. Maybe I am the only one that dreams like that, but might as well dream big. :)

Best - Gary Staley - Castro Valley CA