My aunt bought this coin for a pound whilst on holiday in the UK. Sold as ‘Roman’. Anyone have any clues/hints for identification? Also curious about composition.
EDIT: Better photos and more data.
Clear ‘H’ on the left and 'ITA' maybe on the right? It looks like VII upside down. 



Weighs 8.85 grams; diameter is about 23-24mm but might be a point or two larger on a coin without so much curvature. Also, it's 5mm thick, way thicker than a coin this size usually is.
This also increases the number of coins I have that require a specific gravity test above 1 so I'll post the results of that (when and if, you know how it is).
Thanks for taking a look.