SIX ROMAN SILVER AND COPPER ALLOY COINS ASSOCIATED WITH NERVA (RULED 96 - 98 CE) AND TRAJAN (98 - 117 CE). including a silver denarius of Nerva and of Trajan; a curious gilt bronze coin of Trajan with portrait head on both sides (20 mm. Diam.); and a sestertius, dupondius, and as of Trajan Estimate $300-400