So in the same lot as this (https://www.cointalk.com/threads/agrippa-coins.333938/#post-3380973), I've also encountered a damaged roman silver coin. Due to the worn out state, it's hard to capture the details, so I've both scanned and photographed it: Diameter 13 mm, gewicht 1.15 g. The first photo captures the colour more correctly. Interested to hear some imput!
I think it's Greek rather than Roman. In the second set of images, the reverse (the left image) looks like a small bust of Athena or someone wearing a pushed-back Corinthian helmet. Do I see a hint of a crest on the obverse bust as well?
Thanks @TIF and @ancient coin hunter. As a novice: what (online) reference / website do you advice to check? Would love to see more input from others!