This has always been a favorite coin of mine. I have seen a handful of examples sold over the years. Only a few are in as good a shape as this one and many are missing the gold plug. I always loved it since it is one of the few trilingual coins from antiquity. The counter mark has always been described as a thunderbolt, I think its some type of tamgha. Please share your coins of the Sassanian style, Huns, Hephthalites whatever you got, even if you have a contemporary coin please do share. VasuDeva of Zabulistan Turko-Hephthalite Hunnic Afghanistan after AD 685 Afghanistan, Kabul AR Drachm Senmerv Crown Type. Tri-lingual. Nezak (Nspk) Huns Kingdom of Zabul Vakhu (Vasu)-Deva, Sub-ruler of Shahi Tigin Circa 720-738 AD Ref. Gobl Hunnen Em. 244 31.8 mm x 3.28g. Die position=12h Obverse: Bust of Vasu Deva right in Persian style. Bull head above crown ; 'thunderbolt' countermark, Gold plug . Brahmi legend in field. Cursive Bactrian Greek Legend around. Reverse: Zoroastrian fire altar and attendants. Pahlavi legend in fields, Cursive Bactrian Greek Legend around. Note: Countermarked. Holed. Gold Plugged in antiquity.
Nice! I picked up an example of this type at the Baltimore show last November, on mine the countermark is a lot smaller and less obvious: