I've got a pair on my old Colnago, connected to old Universal side-pull brake callipers.

They are looking a little more worn now. I like the levers.

One thing, they have LOTS of cable pull. That may be good as I think some of the older brakes take just a little more pull than at least some of the modern levers such as the Blaze which are quite small.

And, unfortunately, I lost my cable adjusters which used to be at the levers, and not at the brakes.

The hinge pin will move about 1/8" or so, but doesn't seem to be able to fall out.