Mixed Bag.

Nice mixed bag. The blue deposits give the coin some character, but I would watch the green stuff. From the picture it looks stable and doesn't appear to be bronze disease but I would keep an eye on it.

Nice group of coins, David. A few words about the Elymaean attribution: the most recent serious study of Elymaeans was conducted by P. A. van't Haaff ("Catalogue of Elymaean Coinage" from 2007). Van't Haaff's work is pretty much the new standard for this series. In his study he updates a number of Alram's attributions, including Alram's 469-470's. His take on your coin is the following.

Orodes III
2nd century AD
Van't Haaff 16.1.1-1

It's darn near impossible to acquire Elymaean bronzes that are free of deposits/verdigris. I agree yours looks stable, but of course it'll be prudent to check it once in a while. Good example of the type, btw. I remember admiring that very coin several times at Vcoins...almost took the plunge. I'm glad you got it.

Well, to be fair to the dealer: not so much an "incorrect attribution" in this case as simply an outdated one. As I've stated before, Elymaean attributions - and even Parthian attributions - are sometimes a moving target given the ongoing adjustments suggested by new research.