Watch List notes:

BI Antoninianus, Ticinum mint. Obv. VIRTVS PROBI AVG. Radiate, helmeted and cuirassed bust left, holding spear and shield. Rev. PAX AVGVSTI. Pax standing left, holding branch and sceptre; in left field, T; in exergue, VXXI. RIC 517. C. 427 (Fr. 3). BI. g. 3.52 mm. 23.00 Scarce. Superb. Traces of silvering. EF. Part of a 'coded' series. The letters in the field, arranged in the numerical order of the officinae, spell out 'EQVITI': E/P, Q/S, V/T, I/Q, T/V, I/VI.