Hi, the coin seems to be a Roman Denarius depicting Hadrian (AD 117-138). The reverse is very difficult to read because the photo is not sharp and clear enough; it could be depicting Venus standing and one can read the letters SC: when Roman Imperial coins contained less than the full nominal value in metal, their value was supported by the decree of the Senate "Senatus Consulto" or SC. About is value, I don't know.
O: IMP GORDIANVS PIVS FEL AVG = Gordian III. R: AETERNITATI AVG S-C. The standing figure is Sol. Assuming the holder is a standard size, it should be a bronze As. Value-wise, common.
