SPI, think I may have had a couple of their games myself back in the early 70's. Were they in a sort of plastic tray with counters, map etc. Cant remember exact names but think one may have had "Autumn Leaves" in title (think it was WW1). The second im sure was called "Iron Cross" (WW1 Aircraft) Red fronted box with Black cross on it, remember them fondly anyway whatever there names were
Also had many Avalon Hill from the late 70's - 80's, plus others such as Ambush, Battle Hymn, B17 Queen of the Skies etc. Still have a few of the box games in cupboard, maybe not Avalon Hill though, not looked at them for years. Pattons Best, Tokyo Express, Blackbeard and a couple of others, must dig them out.