Gran Compe ENE mini rack
The Gran-Compe ENE racks are much like the Mafac mini-racks and are designed to support a handlebar bag.
ENE racks mount directly to Gran-Compe 610 and Dia-Compe 750 centerpull brakes. There is no direct attachment to the frame so they can be used on any bike so long as the brakes fit. They are chrome plated steel and the platform is about 140mm x 70mm. The upright is about 75mm high. So they are the right size for an average handlebar bag, but too small for anything larger.
There are four 5mm light mounts under the platform, two on each side. The rack sits level on most frames. At 160g these have to be among the lightest racks ever made. The mounting tangs are 68mm c-t-c, but can be flexed to spread or narrow a little.