Watch List notes:

The Collection of Roman Republican Coins of a Student and his Mentor Part III

L. Coelius Caldus. Denarius 51, AR 3.81 g. C·COEL·CALDVS Head of C. Coelius Caldus r.; below, COS and, behind, tablet inscribed L·D. Rev. CALDVS·IIIVIR Head of Sol r.; behind, S / oval shield decorated with thunderbolt; before, Macedonian shield. Babelon Coelia 4. Sydenham 892. RBW 1550. Crawford 437/1b.
Rare. Lovely iridescent tone, an almost invisible banker's mark on
obverse, otherwise extremely fine