Thank you very much datadragon for joining in with expertise on this topic. I'v been studying the USA cents lately and Zinc Rot always come up. I was inspired by all the work that the US collectors did on this topic and to make my Canadian collectors aware of this coin problem. This posts intent was for education purpose, even myself I'm going to read that link you gave us, looks interesting.
I think for the Canadian 1 cents is, to watch the first production years from 1997, 1998 and 1999 if the Minting prosses was done right. All those bubbly surfaces are the concerns. If the bubbles break its because of the rot. Maybe 2012 if the Mint got sloppy getting out of production year. Time will tell. I still have a bunch more Canadian 1 cents to go through one day and if I ever come across any I for sure will post them in the future.
Been going through my USA stash of 1 cent coins and its not hard to find Massive Zinc Rot on there coins from 1983 to currant times. Lets keep this to only Canadian coins but I want to add a sample how there Zinc coins are rotting internally. Question for all you Canadian coin searchers is, has anyone come across this yet in our Zinc 1 cent coins. Its a scary topic because there even rotting in PCGS holders. For alot of us Canadian collectors you should read up on this topic. Did the RCM doing any thing to prevent this? A couple pics of a USA 1994D as a sample were the D rotted and fell in the crater. Enjoy the pics!! Keep it Canadian please.
This 1980 1 cent has a distinctive dimensional RU with a flat and upper lip. Its missing the ST in TRUST with no markings at all for the ST and no ghosting of the letters. Its a genuine missing ST [ Struck through grease]
Just checking if there is any thing with this 2.73 g coin. Should be 2.5g and the jack pot is 3.1g. Checked all my 1983s with the scale and this coin is in the middle.