NGC 2002-D Indiana quarter reverse missing clad layer. The coin is copper on the reverse side, which is the most desirable side to have missing the clad layer.
MS64 Red/Brown
PCGS 2000-P Massachusetts quarter missing clad layer reverse. The coin is copper on the reverse side due to the clad layer missing before strike. MS64 Red/Brown
NGC 2006-P 25c Colorado quarter reverse missing clad layer. The coin is copper on the reverse side, and is missing the clad layer. A scarce state for missing clad layers. Desirable with the "state"...
2000-P 25c Massachusetts quarter reverse missing clad layer (minor hints of nickel retained on the coin's reverse.) The coin is about 95% copper and 5% nickel on the reverse.