Okay! I took away all the Atlantics to see what was under. The Atlantics seem to be two native american camps, some golddiggers, some buffalo and some cowboys. A bit annoying that he said that there could be more. Somewhere. It's a big house and a lot of stuff so if I'm lucky I can find more.
And the rest is Airfix Napoleonic French Artillery, Some horse from Napoleonic British Hussars, Airfix RAF, Airfix Union Infantry, Airfix French Foreign Legion (2nd version), Airifix British Commandos (1st version), Airfix WWII German infantry (2nd version); Airifix US Cavalry, Airfix Japanese Infantry, Airifix Native Americans, maybe some more. Quite typical mix of figures.
Manolito from Airfix' High Chaparall
And this guy is a bit of a mystery. Looks like Atlantic:
I had all those Airfix, except the Natives (which my younger brother had) and The High Chaparall set that my parents probably thought was unnecessary since I already had the cowboys. And there wasn't such a big difference.