Dave Martinez wrote: <snipped>"Unfortunately, no one makes a polished 650B rim, so in order retain some esthetic value to a 40s bike, I need polished rims."
In about 1979 I built up a wheelset using polished (non-anodized) Ambrossio alloy 650B rims for my wife's English 3 speed. They were built with a SA rear hub and Sunshine alloy QR front. She still rides it as her commuter. I imagine the rims are no longer in production, but they may still be a few out there.
Kevin Ko
Eugene, OR