First , I would be all over this bike.

Second , The Cable guide are add on to the headset like a spacer. Which they used as a guide. The Wing nuts still was used up until the 70s on most bikes. Yes bolts were around but some still carried the 50s-60s wheel sets. Yes they raced with winged nuts too.

Third, Not all but very few had braze-on on the frames as clamp on where still norm until the late 70s - early 80s.

Remember most roadies used their track bikes for winter training. Campagnolo developed the quick release and before then it was wingnuts , also racing the Tour De France on track frames.

just a little insight guys.

S/F,
CEYA!