Above, my aluminum dog bone bicycle wrench made by Verma in Western Germany. (That company seems to have specialized in bicycle tools, such as the "Pedalspanner" below from an ebay auction):
Dog bone wrenches were made by a lot of small companies. Two examples below from the May 1955 issue of The Family Handyman:
My best dog bone wrench is, or was, made under the Craftsman label. I bought mine several years ago out of a "discontinued" bin at Sears. It even has a rare-earth magnet built into it so you can stick it onto a metal surface. I hardly ever use it, but I like its design with the rotating sockets.