According to my very old (22+ years) Guernsey Foundry list, there were four Mexican bandido figures :
OWMB 1 : Two-gun bandido
OWMB 2 : Bandido walking with rifle
OWMB 3 : Bandido, revolver
OWMB 4 : Ragged bandido
Your figures are the first three, I think, the missing one being OWMB 4 (can't even remember what he looked like, to be honest).