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. The platform is about 140mm x 70mm with the upright at about 75mm high, 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 tag on the rack reads, "Designed only for GC610 & DC 750 brakes". Of course we tried it on several other centerpull brakes and managed to mount it on various Mafac (including Racers and Raids), Weinmann, and older Dia-Compe models. The mounting tangs are 68mm c-t-c, but can be flexed to spread or narrow a little.