I was hardly a pioneer. Sequencing short stretches of DNA was pretty standard in molecular biology labs when I was in grad school. And yes, my films looked just like the one T_aquaticus posted. I remember when my department got an automated system, though some of the PIs wondered why we needed it when we had grad students.
I did Maxam-Gilbert and later, dideoxy sequencing in the mid- to late '80s. It definitely wasn’t pioneering work although at the time I started you could still almost get a Ph.D. for sequencing a gene. I might’ve been the first at the university to use the Sequenase kits: So much better than Klenow fragment polymerase. I wish I had kept a few of the X-ray films from that time. They’re almost art pieces now…