I believe it's Athsho, not Vado, on the reverse. Vado/Oado would be depicted with arms up and holding a cloak that's blowing in the breeze. Here's the Mitchiner 3114 from Tom Mallon's site for comparison:
http://grifterrec.rasmir.com/kushan...ush_3114.jpg
The Bactrian spelling of each:


http://grifterrec.rasmir.com/kushan...ush_3114.jpg
The Bactrian spelling of each:

























