Originally Posted by
rando_couche
Not to be contrary or anything but they look like Prugnat S4's (if anything more common than Bocamas BITD) to me.
SP
OC, OR
Could be. I wouldn't claim to be a lug expert. I have the same lugs on an unidentified handmade frame from the late 70s that is undoubtedly of American provenance. At the time, I did some web surfing and thought they were Bocama.