Caligula and Divus Augustus. 37-41 AD. Denarius, 3.80g (10h). Lugdunum, 37 AD. Obv: C CAESAR AVG GERM P M TR POT COS Bare head of Caligula right. Rx: No legend, radiate head of Divus Augustus right between two stars. BM 4. Paris 3. Cohen 11 (12 Fr.). RIC 2. These dies not in Giard, Monnayage de Lyon. Choice EF
Ex Sotheby, 29-30 June 1893, Hermann D. Weber, pl. I, 8. According to J. Spring, this was "the first British ancient coin catalogue to contain photographic plates". Weber here sold off his Roman coins, in order to concentrate on his famous collection of Greek coins that was published in three volumes by Spink in 1922-29
"Caligula at first intended to bestow on Tiberius similar honours to those enjoyed by Augustus, but desisted in face of the passive resistance of the Senate. The two stars (on his earliest aurei and denarii) suggest two 'divi', Augustus and (Tiberius)" (Mattingly, BMC I, p. cxliv).