In 1909 you didn't have all these novelty sets, mint sets, different finishes, novelty silver bullion, annual medal releases and BEP offerings for...
I noticed the FUN site has the floor plan temporarily removed. Perhaps they are shuffling things around a bit? It was there two days ago.
The hardness of the metal would determine the force necessary for striking and the amount of heat given off afterward. 90% silver coins probably...
All of mine are either slabbed or in airtites. I save only U.S. classics, so if it's not slabbed, I'll purchase the needed airtite when I obtain...
If it really bothers you and it is your coin, send it back and ask them to re-slab it.
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