I'd like to find someone who is an expert on oliver combines. I have 1930 Oliver Nichols &amp; Sheppard model B combine. So i'd like to know what other models did Nichols &amp; Sheppard make an what models did oilver make after they merged in 1929. Also does anybody know of any older Oliver combine, i've always been curoius if it is the oldest one in existance. I just got it running yesterday,somebody took very good care of it when they parked it. The carb was clean as a whistle and the mag worked after spraying it with electail cleaner. I havent engaged the combine itself yet as i dont have the right size flat belt. I&quot;d like to here from anybody who know a little about these old combines.