Sorry, I'm not seeing anything on any of these coins that can't be explained by either typical circulation wear or by outright damage. The 1988, for example, seems to have been badly stained by something then cleaned up with some kind of harsh scrubbing - perhaps a metal detecting find that's been cleaned to be re-spent. The 2021 has "road rash" - dents from being pressed into something rough (like pavement). The older coins from the 60s through to the 1980s are all heavily worn and show signs of "circulation flattening", where design elements are worn away and flattened through sheer wear.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis









































