These levers were based on the Dia Compe ADV5, SS-7, etc line of levers but with tweaks to Tom Ritchey's spec. They are some of my favorite for cantilevers or rollercams.
Getting ready to set up Cunningham #31 (a roadbike) but discovered that the neat CLB brakeset I picked up was too long. Quel dommage. So, I picked up this early-ish Suntour Superbe set which should work well and look nice.