This

http://www.dametruth.com/blog/wp-con...a2-600x376.jpg

Most if not all NJS frames are made with 4130 chromoly tubing.

seeing as the page doesn't mention any butting, i'm guessing there isn't any. I get what you're saying when kaisei 019 and 022 are the 4130 alloy but are manipulated differently and are generally straighter. plus i'm sure there's japanese frames built with the nickel alloy steels and such.

but bad deal on that affinity. I got my en jay ess frame with hatta swan hs and sugino 75bb for 420 shipped. njs isn't out of reach, you just have to look for it.

A vintage looking frame or a vintage looking bike?

That Affinity bike you posted didn't have anything really vintage going for it (no lugs even), it just had vintage-esque stem, bars, decals, wrap, and wheelset. It seems like you're more interested in a finished look than the actual frame - in which case you can do almost anything with components.

repaint, ~fair~ buy it now price, some nice provenance:
http://cgi.ebay.com/CARLTON-SPRINTER...item35a6f69aa9
http://i.ebayimg.com/13/!BkrY+!wBGk~...fPvFg~~_12.JPG

anything can look 'old school' with the right parts.

High flange hubs
box section rims
skinwall tires
threaded headset
chunky italian saddle (or brooks)

done

Not old style, just plain authentically old.

Not exactly "track" but true:

http://img.photobucket.com/albums/v1...illa/hall9.jpg

TT - is that one of yours? It's ****ing awesome.

Yepper, thanks Scrod. :D