What's up with the 1966 cent?

[JerrySpringer]

I did a copper cent sort this week and when I do I habitually bounce the coins on a hard table top to hear the copper ring. I have come across a third 1966 cent that makes a thud sound when it hits the table. I mean a thud. Not a ring, nothing. Does not sound like a zincoln thud either. Sounds like like one of those magician coins that has been machined out and fitted with another coin's obverse actually. Could the mint have had a bad run of cents in 1966 where air bubbles or an internal fracture was present in the planchets? The first 1966 cent I found like this was a few years ago and I took it to a coin dealer at a show and he brushed it off saying he could hear the coin make a distinctive sound. Barbara Streisand. Now, these 1966 anomalies can not be rare if I found three so easily without a heck of a lot of sorting. The individual weights of them are a little under and a little over the standard 3.11 gram weight. Oxidation and crud may cause that, so weighing is inconclusive. It is only the year 1966 also. Thousands of other cents from pre-82 I have bounced and they all ring nice when tested. Where is the Coin Mystery Search Team?

[henrysmedford]

How about a wrong planchet stamped on a clad see --http://books.google.com/books?id=KGa2F25lONsC&pg=PA528&lpg=PA528&dq=1966+cent++wrong+planchet&source=bl&ots=DCByWYq8nD&sig=If6srJCGpblg1I0l3pq4w8jKZWo&hl=en&sa=X&ei=RxckT4vhGOqFiAKL_cHmBw&ved=0CDkQ6AEwBA#v=onepage&q=1966%20cent%20%20wrong%20planchet&f=false

[henrysmedford]

PS does it sound like a clad dime? Do you have a Ryedale if so were does it drop. If you use a copper as your test is in the zinc. Looks like a dime should be 2.27 gram. Also the US mint made coins for other countries. So what if!!!!

[penny pretty]

why do canadian zincs ring? spend ten bux on a gram scale and be certain!!

[DirtyFingers]

I've never bounced a 1966 Lincoln cent, but I have bounced thousands of 1982's. Half of them make a silver-type ring
and the other half make a low tone ring after multiple bounces. The low tone ring's always weigh out.

On occasion I've bounced a few badly worn pre-82's just to see if they would ring. Some do and some don't but the scale
never lies.

[OtusLotus]

Could also be that the coin is dirty! Soak it in water for a few hours, dry, and then bounce again!

Also you might wamt to try a different part of the table!