Dia-Compe old school brake lever cable end button - GOLD
Fits 5mm cable housing.
For old school brake levers WITHOUT threaded barrel adjusters.
Examples would be Dia-Compe levers (and various copies from Chang Star, Lee Chi, etc.) such as the Tech 2, Tech 3, Tech 4, and Tech 6.
Additional pictures provided for detail - this listing is for GOLD end buttons.