Joined: Nov 2006
Posts: 19,810
Likes: 597
From: NJ, NYC, LI
Bikes: 1940s Fothergill, 1959 Allegro Special, 1963? Claud Butler Olympic Sprint, Lambert 'Clubman', 1974 Fuji "the Ace", 1976 Holdsworth 650b conversion rando bike, 1983 Trek 720 tourer, 1984 Counterpoint Opus II, 1993 Basso Gap, 2010 Downtube 8h, and...
The only American track bike makers I can think of to google are Pop Brennan and Dick Power; you can find a few images that show their lugwork. I can imagine they all started with the same lug blanks, but did a lot more work on them before brazing.
Tell us the seat post size, too, when you get a chance. It's an indicator of tubing thickness, and therefore of tubing quality, albeit not a really good indicator of the latter... 50's Raleighs with straight gauge 531 tubes used the same 25.4 seat post as the hi-ten ones.