Some of you missed the point..
Early 750 definitely hand welded, but the process and look improved shortly after..
Robot use on car bodies came in later 70,s at Honda, but not fully wekding them till into the eighties.
My main point is welds on a 69 are way different in appearance , than welds from 72 or later..
That is not to say, that individual assemblies were not welded by robot earlier.., the centerstand , is a piece that could easily be machine welded vs say a frame. I ran a robot welder a short while., interesting.. my brother used to orogram them..