The coin no. 3 was originally described under RPC I, 5430, among the uncertain coins. –– RBW comments ‘Interestingly, the obv. die is the same as the Berlin specimen illustrated in RPC, but the legend features Ss, rather than Cs (presumably strengthening the attribution to Augustus rather than Tiberius)’: the obv. legend must be read as ΣEBAΣTOΣ, not CEBACTOC.