Indo-Parthian kingdom
Abdagases, ruled c. 50-60 AD
BI tetradrachm (23 mm, 9.23 g)
Obverse: King on horseback right, raising right hand; to left, tamgha above Kharoshthi letter
Reverse: Zeus Nikephorus standing left in artistic style with monogram left; to right, Greek and Kharoshthi letters
Ref: Senior 231.26T
A rare mint error, being struck twice.
Traces of the reverse are visible on the obverse and vice versa.
Mint errors like this are much sought-after by collectors because these are rare and are proof of the minting process in antiquity.