I have the old style Dura-Ace track crankset labeled 165 YL on back. It is 150 BCD as near as I can tell and it has the 1/8th 48 tooth chainring. Everything is in pristine condition including teeth, finish, taper and in fact is almost without any marring or scratches save for on 1/4 inch scratch on left side crank arm.

I want to swap this for the same in a 170 mm size. I will even consider other brands in a vintage vein.

We both pay shipping so there is no exchange of money. I can easily provide photos if desired.

Garth in Miami (hand to hand exchange - in person - preferred)