What Causes Toning Like This?

I think that is awesome whatever it is. Yes it is a Zinc Large date. The line down the center...I dunno...could it be a Die Scratch or maybe a Die Clash (one of the pillars?)

Cool find from the great white north

EDIT***I looked at the overlay and its to big to be a Clash of the pillar***

Heat

Liver of sulphur gel. I am sure of it, although there are other ways to produce the "Amazing Monster Toned" coins, the easiest way is using a jewelers toning gel that is called Liver of sulphur. I think it is certainly harmful to coins, yet people are making a ton of money deceiving buyers into thinking that the coins are naturally toned like that.

Coin toner products are sold. The fakes ones look just like this.
Most coin albums also tone the coins inside. Usually not the desired look:

@coop, maybe but once again, this came out of a sealed box of Brinks $25 pennies purchased from Machias Saving bank. Seems unlikely that somebody would spend $$ on the products to do this to a zinc 1982 large date with no DD or other errors and then put it back into circulation instead of selling it.

I can see what you're saying coop but it just seems like alot of work for nothing to me. Either way, I put it in a 2x2 and tucked it away to view another day. Thanks to everyone who took the time to reply on this thread.

Yeah, I looked at it too Coop and Chadwick. Sorry about the late reply to the link. For some reason when I read the last post I didn't even notice the link to the ebay auctions there. I was getting ready to turn in for the night and I didn't even notice the link until now. Sorry about that Coop. To me, most of these coins look heated and fake and I noticed that none of them seems to be evenly toned and nobody even posted a clear pic in the auctions. I agree that there are sellers on ebay who will take full advantage of unsuspecting buyers and keep themselves safe by their choice of words in their listing. People will say stuff like uncirculated in bank roll but not include the word unsearched in the auction. I guess that it's up to the potential buyer to ask those questions before making the purchase. Anyways, thanks again Coop.