I've been checking every coin that was in pocket change since about 1970 up to 2010. Way back, I found this beat-up quarter and thought it looked odd. The images were weak and it was a bit off-centre. The caribou's eye looked like a bigger bulge than normal. I put it aside in a 2 x 2 and marked it as off-centre, incomplete caribou head, weak strike, and left it at that.


Many years later after, using a loupe, I noticed something else. There seemed to be an impression of another coin on the reverse. I thought maybe someone had fun with a hammer and smacked another coin on it, and again it just got put away.


With this and other coin sites having all kinds of error posts, I was looking through mine again and came upon this coin again. Having seen many photos of basement-made "errors" in other posts, where two coins were forced together by vise or hammer, the impression was always backwards. On my coin, it's not, and it doesn't look like it is impressed into the quarter.
A head-scratcher, I didn't know what to make of it. How could there be an impression of a nickel on a quarter ?
After checking it some more, I saw the ghost image of 5 CENTS by the letters NADA. The rim is doubled just above it and there are "stretch-marks" aligned from the centre to the rim. More head-scratching.



Then it hit me. I have a scale that measures to a hundredth of a gram. Look up weight of 1975 quarter - 5.07 grams, look up weight of 1966 nickel - 4.50 grams.
EUREKA ! Mine is 4.48/4.52 grams. It's a darn 1966 nickel used to make a 1975 quarter, impossible. Or was someone making basement jobs at the Mint ?