Yeah, I can't tell between Vitro or Marble King here. And probably I would lean toward Vitro, like Al said.
If Vitro, it's from the 1950's. I can tell you that much. They switched to a different style for the 1960's.
Hmmm ... Al ... do you think it could possibly be Peltier? I know that's a long shot, but something makes me want to ask. (If Peltier, that would put it maybe as early as the 1930's ... but that really is a long shot.)