>>1679125>>1679120Finally figured out the right keywords. They're apparently from the 80s, "Lee Chi" branded and either an early version of their Sine Power or just called a generic centerpull.
They're supposedly really shitty with a very narrow range of adjustment which requires constant fiddling as the pads wear.
https://www.youtube.com/watch?v=PJErXn5q5XwNo clue if they copied someone else - I'd assume some garbage ancient no-longer-patented brake like picrel because Campy Deltas were a trend at the time.
