I believe this coin is Roman but I'd like that confirmed. Can anyone give an approximate date and any other information possible (maybe difficult as it is quite worn). It measures between 2.5cm and 2.7cm in diameter.
I'd also be interested to know (if possible) what it could have bought at the time (e.g. a loaf of bread?, a pair of shoes?).
Examining the coin in bright light under a magnifying glass, one can detect more than in the photos. Specifically, one can see 4 letters (circled below).
There are two letters inside the yellow circle AV, presumably the first two letters of 'AUGUSTUS', though I'm not sure this helps much.
Perhaps more useful are the letters in the white and blue circles. These letters look too far apart to be from the same word. The one inside the white circle looks like 'T' while the one inside the blue circle could be P, R or possibly even B.
If the second letter is R, I'm wondering if the two letters in the white and blue circles could be the first two letters of T R P (TRIBUNICIA POTESTATE)...