The earliest copy I own is the 2000 VHS-Box Ogre/GEV version. All of the pieces have stuff on the back. Infantry have a different number of squads, armor have disabled versions of themselves, etc. This holds true for the other expansions from that era: Shockwave, Reinforcements, and Battlefields.
I have a third edition copy which had double sided counters. Came in a hard case. Thin card which had to be cut out with scissors. I think all the SJG editions had flip sides and only the meta gaming first printing did not.