I work in a Community Bike shop where we are seeing a number of items (mainly racks and bottle cages) with the "Jim Blackburn" marque. Mainly these are on older touring bikes such as an early 80's trek 620 or an old fuji. Are these items "special" or are they just an old rack? I can't seem to find any other identifying marks on them, nor can I find anything online about them. I am thinking about putting one of these on my cross-check for doing some cargo-hauling and light touring this summer but don't have a clue what sort of weight they are rated for. I know that modern "Blackburn" racks have ratings and am curious if they are similar. The one in particular is alloy, three stays on each side, open top rather than a platform and a single stay which I presume mounts to the brake hole on the rear brake bridge. The tubing does not look particularly beefy, but must have been used for touring at some point because the bike we took it off of had sizable panniers on it. Thanks, Andrew