Hippostratos, King of Baktria, ca 65-55 BC. AE rectangular unit. 24 mm, 9.71g. 

BASILEWS SWTHROS IPPOSTRATOY around Apollo, standing right, holding arrow, quiver on his back.
tripod. TAR monogram in left field, Karosthi "a" to right.
 
BMC 14; Bopearachchi 9A; Hoover HGC 458; Whitehead 627. 

With permission of cngcoins.com, auction 432, Lot 150, Nov 2018.