Ray is correct. That would be a Model B at that serial number with the endgate. I believe the Model C machines in the Triumphs were an extremely short run of less than 1000 produced so the number of Model C Idelias can only be a few. My Model C Triumph is 74157C and I have never seen another. The highest Triumph B I have seen is 73135 and the lowest D was 74800. I have lost Terry Baer's email. I don't think my machines were added to his list. Could someone please pass on his email to me? Thanks... Kindest Regards to All, Al **************Biggest Grammy Award surprises of all time on AOL Music. (http://music.aol.com/grammys/pictures/never-won-a-grammy?NCID=aolcmp003000000025 48)