I'll get the ball rolling with some early British coppers; these are some of the first coins I ever bought, way back when I first started "collecting" per se (when I was around 12-13) and didn't care about grades or value. I rarely buy coins in conditions like these anymore (unless it's a scarce type otherwise), but these coins are still part of my collection:

1806 United Kingdom 1 Penny - George III
The reverse is relatively OK, but the bust is obliterated by corrosion, verdigris and pitting. Not like George III was much of a looker to begin with, but this doesn't exactly help.

1724 United Kingdom 1/2 Penny - George I
Another very worn British coin I have; this one cost me exactly £5. At least it's still identifiable.

1678 Scotland 1 Bawbee - Charles II
This one was on the brink of being unidentifiable, but the thistle helped me pin it to Scotland, the bust matches up with Charles II's, and the date of 1678 is just visible.
I'll look for a few more in my continental Europe collection once I get back.


































