Have You Ever Had An Unplanned Coin Purchase?

I bought Ptolemy X11 silver tetradrachm (55-51 BC), in good VF, for $7. That was 40 years ago.
Found it in a dealer's junk box but it was very heavily encrusted and unidentifiable. Rubbed a lot of dirt off it with a dry rag, but still unidentifiable.

Asked dealer what it could be. He said it could perhaps be an ancient silver coin. He suggested that if I wanted to risk it, he would drop it in acid.
"OK" was my reply, with the possibility of a total loss.

Into the acid it went, he watched it like a hawk, and pulled it out at just the right time, and immediately thoroughly rinsed it.

Currently, this coin valued at perhaps $200.

Very nice!

Thanks! Oh, that is light reflecting near the eagle's beak - its not a flattened or damaged area.

Now I have to work on the expensive hole! Actually I am missing a number of the early ones (of course) and still need to pick up a 1938-D. I think about 9 holes in all need filled. Not bad for a collection pulled from circulation "back in the day."