It's a fascinating coin that gave me pause when I first spotted it at auction. On November 12th I started a thread at Parthia-L about it. Here are excerpts from that post:
"(The seller) has the coin listed as 'Cf. van’t Haaff type 12.3' – a variant of a Kamnaskires-Orodes AE drachm. There are two documented reverse types associated with the drachms of Kamnaskires-Orodes. One, VH type 12.2, features a small facing bust of Belos, with large hair tufts on each side, surrounded by an Aramaic legend. The other, VH type 12.3, displays a pattern of dashes/lines. Sometimes the dashes/lines are randomly placed, but sometimes they are arranged in an orderly (i.e. parallel) fashion.
The reverse iconography of the (seller's) coin is not only different, it is wildly unexpected for an Elymaean drachm. It features a crude cross surrounded by either cropped pellets or legend. My first thought when I spotted the coin in the auction was that the reverse would be more at home on an AE of the Vandals, Visigoths, or such. It is so unexpected.
Another oddity includes the appearance of the obverse anchor, parts of which seem to be missing in action. I suppose this could be due to a clogged die – but I’ve not seen anything quite like this one.
(...)
I know (the seller) has great numismatists on staff who vet all material before listing. The coin passed muster, obviously. And, of course, anyone who handles a lot of Elymaeans is used to all sorts of weirdness popping up from time to time. But this one is weird to the extreme.
I'm curious if anyone has seen an Elymaean drachm with the same or similar reverse die."
In the replies my post received, Parthia-L members felt the coin was authentic and that, while the reverse is admittedly odd, such things are part and parcel of Elymaean coinage. I had also expressed, in my post [in the "(...)" part above], some concerns I had about the appearance of the coin's edge, as seen in the photo Virgil provides here. But, as another member pointed out, a second photo that the seller provided with the listing (a photo I had not noticed when I initially spotted the coin in the auction) made it clear that the edge is okay. Apparently, it is the lighting and reflection that gives it the suspicious look we see in the photo here - as if halves have been mounted together.