Last 25 rolls of quarters was turning out to be a dud - a couple of recent holes filled, some upgrades. Then I found a silver - first one in about 120 rolls! Then I found another "W". Both keepers, but neither was a hole-filler. The silver was worse than the one I collected 60 years ago. As for the "W", it was my 4th in two months, and first duplicate (but better condition than the previous one).
