Thanks to people's help, I now know that I picked up a pair of
Dia-Compe 287-V brake levers today.

I need aero levers for a bike that I am putting together. I have some
RSX (or RS-100?) dual pivot standard reach brakes. And I still have
the original brakes from the bike, 105 single pivot side pull brakes
from the late '80s- BR-1050. Looking around the internet, it looks as
if the 287-v levers aren't recommended for dual pivot brakes.

Anyone know how they would work with the single pivot side pulls? The
105 brakes are in good shape, and I think that they have more fender
clearance than the RSX dual pivots, so using them has some advantages.

My other option is to get standard aero brake levers for this bike's
setup and save/sell the Dia-Compes.