I do not read archaic Hebrew, so the exact year or catalog number may be incorrect, but that's from the Bar Kochba revolt. I think it's year 1. Meshorer, AJC II, 266, 7a.
This is one that you describe from the benson collection. It is different- the circles are dots around the flan. The grape bunch isn't singular. I am thinking this is a crude replica? It was listed and sold very cheap on ebayBar Kochba revolt. I think it's year 1. Meshorer, AJC II, 266, 7a
I have not been able to find anything like it and I have scanned a lot of lists etc. The grape bunch alway has I guess they are two leaves on either side at the top. This one has none.