[texxtxxet]

Relevant Sheldon Brown article of course:

"they are welded, not brazed. [...] There are necked-down parts that fit into the top tube and down tube, like internal lugs."

https://www.sheldonbrown.com/chicago-schwinns.html

[Kon-Peki]

Oh man I had a bright metallic green Varsity as a kid. That was a great bike and I really regret getting rid of it, or rather abandoning it at my parent's house when I went off to college, and they got rid of it :(