I can't believe someone brought up NJS, and forgot to mention 3rensho.
There's nothing special about NJS frames over a regular track frame, they just have hipster tax on them. Well, they might be painted better and be heavier, but that's about it.
I remember in 2007 or 2008, bridgestones RB1, RB2, RB3 were going for something like $300-500 because of hipster taxes.
NJS is simply a standard to keep competition about the rider than the bike he's riding while racing in keirin.
not much different from how UCI dictates what a bike is for their events.
now that is the info i was looking for. so wen it comes down to it most of your older frames are about the same...my condord looks just like allot of other old road bike like allot alike. so im going to take your word on the hipster tax.its kinda what i was thinking all along haha. im just going to keep my eye out for an extra clean frame that has something cool going for it..i.e. paint job and what not. thank for that last post big time!!