Cru'dads thoughts:
'Silver Searcher has stated that it is not possible to say precisely what the blank coin is – in this he is being accurate. However, as you know I have measured, weighed and identified Roman like coins in great detail covering Scrappies (or Grots as they are known) for over some 6 years – dealing with thousands. The irregular shape and corroded condition of this coin plus its size which I guess is somewhere around 13mm to 18mm, a width of 0.7 mm to 1.7mm and weight between 0.9 gm to 2.4 gm would almost certainly make it a Roman AE3/4 of the mid to late C4th. I believe there may be an Exergue line across the base of one side and shadow impressions of either 2 soldiers either side of a standard or 2 Victories facing with a Palm between. So my conclusion, even though this has no firm proven details is that it screams “most likely Roman Grot” to a 90% certainty in my eyes. If the measurements and weights are within the boundaries I have conjectured then that rises to 99%. There may be some deposits on the coin that would increase its normal weight. As a long shot, soaking in olive oil over a very long period (weeks), with a gentle clearing away of loosened debris every few days, may reveal a bit a detail.'