Hi was wondering if someone has see this minting error coin as I have only see this one that I got back in change in the 80's and haven't been able to find any information on it .It is only about 1mm thick and the regular one kronur is about 2mm.Other than that they look just alike.Would appreciate any information as how rare and in what price range is it worth.Here is a picture of it.Thank you.
Thank you for your opinion but I don't think it has been immersed in acid it would not have made it just 50% thinner without destroying the design besides I have also a one kronur coin from 1970 which is exactly 1mm thick and they were minted from 79% copper,1% nickle,20% zink that I got in from the bank 11 years early.I have uploaded a picture of it also.
Blurred, thinned design elements, perfect centering, an abnormally small size, and a thin-to-vanishing rim are all characteristic of acid jobs. If there's reeding, you'll find that the gaps in the ridges have expanded and the ridges have become thinner. This "scalloped" reeding is also characteristic of acid jobs.
OK thank you ,does the coin shrink as the coins are not quite the same diameter as the others I have with the same date? Just curious as I have never heard of people putting acid on a coin.I was checking the coins after your reply but think I will keep them anyway.
The corrosive liquid eats away at all parts of the coin, including the edge. So its diameter with shrink over time.
