This is a coin that should be seen by someone in the know before it is sold. I am surprised at the color since a coin with RSR in exergue would usually have too much silver to take on that color patina. Is it then a barbarous copy in AE of a silver original? The obvious place to have it seen would be the British Museum but I assume the owner skipped reporting the find if it is a UK item. I would love to listen in on the conversation if the coin is shown either to the CNG office or the BM. As a rank amateur in Carausius, it strikes me that there are more barbarous or unlisted coins than there are 'normal' ones. Drawing the line between different and unofficial is a job for someone who realizes the cash difference that this would make. Is it fake, barbarous or super valuable?
I have emailed Rich (Mauseus) with images of this coin. He is the Carausius guy as far as I am concerned...he will know whats up and I'll report back. The finder says he found it about 20 miles from me, he's down in a week or so, so I may persuade him to meet up and I'll take some proper pics and weight etc. so it can be recorded by the BM/whoever is interested. I have to say, it looks good to me...the soil deposits are not unusual for this area. It was found 5 miles from Stonehenge......a landmark I drive past 4 times a week.
Hmmm? => sadly, I seldom put faith into the tales of the guy that "found it, just down the road" (but hopefully this is a good news story)
I have two more pics, I have advised him to send it to the BM. It looks a little more like an ancient imitation (I dont like barbarous as a term) to me with the new pics, but then all coins of that era were not of the best quality in bronze. No weight as yet....but i reckon about 18-19mm from pics. Rev legend is ROMA MILE then possibly T, could be a mispelling of ROMA MILITUM?