Those are rebuildable, sometimes. Take it apart, look at the bore.This picture is to ask you fellas what you think of the master cylinder reservoirs. The rubber caps don't seal at all and there's basically no fluid in the brake system. Should I try to source just the reservoirs, or is it worth getting a whole new master cylinder unit?
View attachment 2809242
I like patina as much as the next guy, I'd probably get a new master and reservoirs.