I was weighing a few 40% silver Kennedy's and they were all the normal weight (11.5g) except one, a 1967 that weighed only 11.32g. It's in the same condition as the others, including other 67's. How could there be such a difference when it looks identical?
that is about the right weight for a wrong planchet---for a clad planchet-- I can't remember totaly but I think that there was a 1967 found on a wrong planchet---if you are new a coin dealer you might want to take it to him and see what he saids---if there is any chance it would be a good idea to send it to PCGS---I suggest PCGS because all of their error coins pass by Fred Weinberg <sp?> Speedy
Specs for a 40% silver planchet is 11.5 grams +/- .4 grams. So as long as it weighs between 11.1 and 11.9 grams it is within the Mint tolerance. The +/- .4 grams for this issue is a much larger toerance range than what is normally allowed. The silver issues from 1947 - 64 were only allowed .26 grams and before 1947 they only allowed .097 grams.
Looks like I was wrong---I didn't know that the mint would let that much weight be in the tolerance. Speedy
It's interesting. As our technology has become more and more advanced over the years from crude equipment, to finer, to electronic, computer controled etc the acceptable tolerances keep getting losser and looser. Back in the early mint they counted the coins using counting boards and they could report daily totals to the coin. at the beginning of the twentieth century they had mechanical counters and could get weekly reports to within a hundred coins. In the late twntieth century they installed computerized high speed counting equipment for precise information on production, and you could only get quarterly production figure to within a thousand coins and you had to file a FOIA in order to get the infomation.
