Forgery. Probable core of plated denarius. Alternatively, it could be a smaller denomination struck in bronze. Die-axis: 6 o’clock Weight: 3.09 grammes IMP CARAVSIVS P F AVG, Laureate, draped and cuirassed bust of Carausius, right. (obverse) [EXPE]CTATE VEN[I], Britannia (wearing mural crown) clasping hands with Carausius. (reverse) Thank you British Museum for images and texthttps://www.britishmuseum.org/collection/object/C_2000-1201-1