Here is a Nero Dupondius that made it easy on me - it has a "II" below Victoria on the reverse as well as being radiate. An interesting experiment in double-marking the denomination, but not one that was used very long: Nero Æ Dupondius (c. 64-67 A.D.) Lugdunum Mint NERO CLAVD CAESAR AVG GER P M TR P IMP P P, Radiate head right, globe at point of bust / VICTORIA AVGVSTI, Victory advancing left, holding wreath and palm branch; II in exergue. RIC I 379; WCN 495. (12.38 grams / 28 mm) eBay Feb. 2020 Attribution Note: Many varieties of this type: Obv.: Radiate (not laureate) bust right, CLAVD and GER (no M), two P's at end of legend. Globe at tip of bust. Rev.: Victory walking (not flying) left (see ground line below feet, above II) Here's an enhanced view of the II - I don't see this on your example; perhaps the II wasn't on all the dupondii? Nero AEs confuse me, there are so many varieties: