These are all 1oz 99,9% pure silver coins no?
Yes, 1 Troy Ounce each, 99.9% silver.
In the auction description, the rounds appear loose. Are they not kept in protective sleeves, at least?
No protective sleeves, but stored in my safe on a felt pad & only handled with gloves. No fingerprints or milk-spots.
(I'd purchased them as conversation piece for people interested in silver, now just don't have the room in my safe)