What's the other side look like? I'm having trouble telling how far into the tube that is. I'm sure they have had the occasional failure there, a lot of the people doing brazing were relatively inexperienced and some never got better at it. And they had a quota, so filling the stay with a full stick of brass wasn't rewarded. It doesn't take a lot of filler to make an adequate joint there. When I was there, the people that did most of the rear dropouts were also the people that finished them. So their emphasis was filling the end so they could scallop it, I'm sure.
There are Schwinn paramounts in existence where the bullet joint isn't even completely brazed all the way around and they have lasted 40 years now. I'm sure there are tons of them out there where the only filler is right at the edge of the tube.
Last edited by unterhausen; 07-04-20 at 07:47 AM.