Have had this Sestertius for a long time, actually it is one from my dad's collection. The reverse is worn, it seems to be “COS III” or could be “COS IIII”. The attribution for COS III is RIC 413; for COS IIII it is RIC II 432. It maybe BMC 746-747 for the bust type, and RIC 413 based on average weight and diameter, but in the BMCRE (Vol. 3, Mint of Rome, Trajan, p. 152) number 733 doesn’t have an entry for bust type a, but the entry BMCRE (Vol. 3, Mint of Rome, Trajan, bust type a, p. 156) 746-747 are for bust type a. AE Sestertius Rome, 101 - 102 AD or 99 – 100 AD 32 x 33 mm, 21.38 g Obv.: IMP CAES NERVA TRA / IAN AVG GERM P M Laureate bust of Trajan to r. Rev.: TR POT (COS)III(I P P)?, Pax seated to l. on throne, feet on footstool, holding branch in extended r. hand and scepter in l. In exergue S C Appreciate very much if someone can please help to identify the right RIC number