Originally Posted by
cny-bikeman
Those Shimano calipers look fantastic and function perfectly well. It's your choice to "upgrade" but make sure they get a nice home.
I had a set of those BR-6400 600 single pivot brakes I got at a very good price and installed on an '85 Bridgestone 400 as an "upgrade" (mostly for looks) over the Dia Compe OEMs. The did work as well as any single pivot brake I ever used but my first experience with double pivot brakes made a believer out of me.