Watch List notes:

The Roman Empire

Claudius, 41 – 54. Denarius, 46-47, AR 3.62 g. Laureate bust r. Rev. DE BRITANN on architrave of triumphal arch surmounted by equestrian statue between two trophies. C 18. RIC 34.
Very rare. Light iridescent tone, surface somewhat porous, otherwise about extremely fine