~ Vintage Shimano 600 Ultegra HP-6400 BC-1 1" Threaded Headset - Tri Color ~ 

 Headset is in good condition with minor tool marks - logo is a little worn (see pics). 

Locknut is Dura-Ace - 1" threaded headset

Thanks For Looking - Bicycledreamer, Always Dreaming of Bikes!