Chuck: I wear a black hat on Shabbos still. My grandfather, in his first marriage (to my grandmother, who passed away when my father was very young) did wear a ring. My father has it now, although he doesn’t wear it.
In fact, one Shabbos when I was visiting my parents, an old man in their shul (he’s almost 100 years old) asked me if I was European. He said that when he was young in Europe, most married men wore rings. He wanted to know if I was from Europe, and that was why I was wearing one.