Hey guys!
To your knowledge, what is the lightest non-carbon (preferrably vintage)
wheelset out there? I'm looking for readily-made sets rather than rims/spokes/hubs data.
Thanks very much!

Also, the best bottom bracket on the planet? (for JIS, Campy, Italian thread).
Buy the best I mean the combination of the bearing-quality, strength, durability and lightweight.
So far I'm looking at Phil Wood or NOS C-Record.

Boutique wheels are a non-cv invention (if we dont count Roval and 1st gen Shamals/Cosmics as CV), so all combinations of hubs, spokes and rims are possible and were common. Thats why not looking at individual components doesnt make terrible much sense to me

Look for some wheels with Mavic Argent 7 or OR 7 rims (265g), or Nisi Pista (227g) but bring a nipple spanner, you'll need it. lightest useable rims üpossibly are Mavic 330s.
https://www.rouesartisanales.com/article-645694.html

or, if you want to throw the wheels on something more vintage, look for Scheerens.

Fiamme Ergal rims - 290 grams each
Super Champion Medaille d'Or - 260 grams each
Nisi Sludi - 290 grams each
Mavic Argent 7 - 260 grams each

DT revolution spokes (32 each wheel) - 250 grams

Brass nipples - 65 grams

Hubs, this is a best guess but low flange Record/Mavic/Phil hubs with skewer would be about 500 grams for the pair. I'm sure someone will correct me if I am wrong.

So you are looking at 1300-1400 grams total, not too shabby if it includes skewers.

Non-vintage: Topolino 1383 gr. alu rims; C/f + kevlar spokes.

https://www.sheldonbrown.com/rinard/weights.htm

I have always been astonished by campy bottom brackets. They are soooo smooth, even after thousands of (maintained) miles. Of course, I'm astonished by Phils too.

Maybe I'm just easily astonished.

but then again, I'm not astonished by Shimano cartridge bottom brackets after thousands of miles. Nor FSA's. matter of fact, I have a couple of hotrod OMAS bottom brackets that are, um...non-astonishing, to put it charitably.

C-record BB. mine has done about 250,000 km since 1985, about 20-30,000 of that in single speed mode, and it's still like new. smooth and soft, and easy to maintain.