I patterned the drilling for my ring after the ring above. Eddy rode a great variety of rings, and I found photos of similar rings, but this is the only photo I found of this particular drilling style.
This photo is from page 124/5 of the January 2005 issue of Cycle Sport America. The photo was taken during the 1971 Tour de France.
This a close-up of the photo above. If anyone can point me to another, hopefully better photo of it, please let me know.