Hello, I’m looking to get as much info as possible on this set, country of origin, age (about) I would like to sell it. There are wear marks on the base of each piece I know, I just want to be as accurate as possible, the stoppers are ground on the side, help one’s stuck. They are blown glass and each cut is not precisely as the others, they are each a lit different. Any info would be greatly appreciated thank you. I would call it a blown glass, cut to clear cobalt overlay vanity set.