McMahon Racing Corp, MRC Aero Link Enclosed Center Pull Brake Set. Finish: Raw Aluminum, Front Brake has Laser Etched Logo. Adjustable Aluminum Cable Stop (missing 1 of the O-rings). From the Early'90's.
Front - 97.5 grams. Rear - 96.6 grams This is the only set I've ever seen. I have found a photo of a Black finished set on the VeloBase site. Steve McMahon produced a small number of mostly Mt. Bike Products in the mid'80's to the mid'90's from his California Factory. I've found part of a printed MRC catalog from the mid'90's for this information. This included Steel & Titanium Frames, Ti Seat Posts, Ti Stems, Cro-moly Tubular Crank Arms, Ti & Aluminum & Cro-moly Spindles, Power Link Brakes (a type of cantilever brake) and Cantilever Brakes.