Alexandria – Tiberius? 22mm, 9.25g Recently I've been cleaning a group of heavily corroded Alexandrian coins that I got as a lot. They're not a hoard or anything, just accumulated culls or near culls from a dealer. I've actually had some success cleaning some of these, and I will share some of those gems later. I had high hopes for this one since I could see a bit of the obverse bust through heavy corrosion, but after removing some of that – hard, thick stuff – with citric acid, I found the surface underneath to be heavily scratched on both sides. The reverse seems to have been rubbed bare. If I'd first seen the coin in this condition, I'd guess it'd been harshly clean, but it seems that this damage must have occurred in antiquity: the scratches were beneath the layers of corrosion. I think that if you look closely you can see that some of the scratches run beneath some of the remaining corrosion. The low relief of the field between the obverse inscription and the ruler's bust (Tiberius, I suspect) has been spared because of its low relief. Any guesses as to what happened to this coin, or anything similar that you've seen? It's like an ancient parking lot penny that's been run over by the wagons a few too many times, or maybe just the result of a bored someone's scratching.