Sale: CNG 70, Lot: 649. Estimate $200.  Closing Date: Wednesday, 21 September 2005.  Sold For $170. This amount does not include the buyer’s fee.

[Roman Imperial] NERO. 54-68 AD. AR Denarius (3.19 g, 6h). Rome mint. Struck circa 64-65 AD. Laureate head right; c/m: DR monogram in triangle / Nero, radiate, standing facing, holding laurel branch and Victory on globe. For coin: RIC I 47; BMCRE 60; RSC 45; countermark unpublished. VF, test cut on reverse. ($200)

The meaning, dating, and locality of this countermark are completely unknown.