Roman Republican. C. Coelius Caldus (51 BC). Denarius (AR, 3.83 g, 18 mm, 10 h), Rome mint. C•COEL•CALDVS / [COS] Bare head of the C. Coelius Caldus right; to left, tablet inscribed L•D (libero damno) / CALDVS•III•VIR Radiate head of Sol right; to left, S above oblong Gallic shield ornamented with thunderbolt; to right, round Spanish shield. Crawford 437/1b; RBW 1550; Sydenham 892; Babelon (Coelia) 5. Fine republican portrait. Attractive light toning with a light iridescence. Good very fine. Ex Dr. Ittai Gradel collection (1965–2026). Ex Adolph E. Cahn, Auction 71 (14th October 1931), lot 1263. Ex Dr. Franz Prix collection, Otto Helbing, Auction 63 (29th April 1931), lot 107. This Roman Republican denarius of C. Coelius Caldus (51 BC) was sold in Auction 63 of Otto Helbing Nachfolger (19th April 1931) and came from the collection of Franz Prix, who is attested from 1881 as a grammar-school professor at the Imperial and Royal Theresian Academy in Vienna. There he was also curator of the Theresianum’s coin collection and represented his institution in Vienna’s Numismatic Society. He published the Roman coins in two volumes, as well as further works on classical philology.