This is a nice vintage production fillet brazed frame. I researched a bunch and couldn't find anything exactly like it, but it is similar to the early Jamis fillet brazed frames. It had no identifying marks when I got it other than a Tange Prestige decal. I stripped the spray paint off of it with plans to get it painted, but have too many projects going right now. Seat tube 19.5" center to center, 21.5" center to top. Top tube is 23".