The OSG version of Panzerkrieg back around 1976. I set up it countless times with plenty of false starts. Still have it and even took it out for a spin a year or two ago. Good game, tiny hexes.
ditto here, Panzerblitz 1970. Along the way to PG I eventually bought every game at this scale excluding SDC's Dunquerque. Beyond Normandy, with all its problems, convinced me that Nirvana had arrived.