OK, I am convinced and was mistaken about Campy sidepulls being a fixed spec for SCs and dictating anything about the centerpull bridge.
I had a "70 era TdF that also had this "leaf" staycap feature and was pretty nicely brazed, or so I thought at the time. It had Simplex forged DOs with the "finger" on the NDS, Simplex forkends. It looked VERY sharp after I had new paint sprayed by Ed Litton! He also brazed the Campy RD boss to the DO and some other nice braze-ons. Too bad I sold that thing during a house-move!