Watch List notes:

MACEDON, Thessalonica. Gaius (Caligula), with Antonia. AD 37-41. Æ (20mm, 8.23 g, 6h). Laureate head left / Veiled and draped bust of Antonia left, wearing stephane. RPC I 1573; Touratsoglou – (V5/R6; unlisted die combination). VF, glossy pale green patina, traces of earthen deposits.

From the Belgica Collection. Ex Gorny & Mosch 170 (13 October 2008), lot 1732 (where it hammered €650 on a €400 estimate).