(2 coin set) 1969-S Roosevelt dime 2 coin mated pair. The 1st coin is double-struck off-center, and fits into the 2nd coin, which is a brockage. The coin's were struck with one partially over the top of the other, resulting in a mated pair set.
A rare set, with proof mated pair dimes being very tough to find.
NGC PF63 and PF66 Cameo with white surfaces on both coins.