Coin from the collection of prof. Bartosz Awianowicz.
Roman Imperial
Caligula (37-41), Quadrans 40-41, Rome mint
Obverse: pileus flanked by S-C
C CAESAR DIVI AVG PRON AVG
Reverse: large letters RRC
PON M TR P IIII P P COS TERT
Diameter 18 mm, weight 2.67 g