I have a Raleigh Team Pro with 24-spoke Campagnolo Record hubs front and rear. The Record hubs were available from 24-hole to 40-hole, and nowadays, lots of NOS 24-hole sets seem to show up on eBag.

I initially built the wheels with 15/17/15 chrome-plated Berg-Union spokes (this was the pre-DT era), which was dumb. You almost couldn't see any spokes from ten feet away, and I couldn't keep the rears from loosening, so I loctited 'em. Rims were (and still are) super-light 285-gram Fiamme Ergals. The biggest problem with wheels like that (other than major flexibility!) is that if you break a spoke (or a ferrule blows out, in the case of the Ergals, which happened to me once) the bike becomes almost unrideable. I've since become a little bit more reasonable and re-laced the wheels with DT straight-gauge 15 ga. spokes, but they are still crazy-light wheels that I wouldn't recommend for most riders.