From 1889 edition of _Principal Coins of the Ancients_ Public Domain scans offered by ESnible from his site http://www.snible.org/coins/hn/bactria.html (July 10th agreement by e-mail).
This image has been (or is hereby) released into the public domain by its author, ESnible [2]. This applies worldwide.
In case this is not legally possible: ESnible [3] grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.