Watch List notes:

T. Didius. Fourrée Denarius, 113-112 BC. D/ Helmeted head of Roma right; behind, ROMA in monogram; below neck truncation, X. R/ Battle between two gladiators; in exergue, T. DEIDI. Cr. 294/ 1. B. 2. AR/AE. g. 2.98 mm. 19.00 An outstanding fourrée example, brilliant and superb. Two small breaks in edge plating. Good VF.

This type probably refers to T. Didius, who had been sent in Sicily in BC 138 to put down the revolting slaves. (RSC I, p. 44).