Vintage Colnago 1” threaded headset. Italian thread 25.4 x 24 tpi . Item is in good used condition. No pitting in any of the bearing races. Some blemishes in the chrome on the outside of the top race. Top nut shows the most wear from tightening down (refer to pictures). I believe this was manufactured by Campagnolo for Colnago, looks exactly like a Campagnolo record headset with Colnago branding. Please reach out with any questions.