Hi Chris,
   One queston that might be of interest would be what Oliver/ years were their biggest sellers. It might indicate what type of tractors were in the local area.
..........sorry, thats all I got right now! <!-- s:lol: --><img src="{SMILIES_PATH}/icon_lol.gif" alt=":lol:" title="Laughing" /><!-- s:lol: --> 
                       Cal