I think American Classic was started by Alan Kingsbury and Gary(?) Shook, Kingsbury using some capitol from the settlement of his awful TT collision with a cement truck. I have a American Classic style post that is marked Kingsbury, bought around '86 or so; apperently a schism? I've always liked these posts- very light, and actually microadjusting. I ,too broke one as described, but on a mountain bike!
Best regards,
Wes Gadd
Unionville,CT