Vintage set of 6 Libby glass coffee mugs w/ a gold monogramed R. They are in EUC. No marks, scratches or chips. The monograms are all in great shape. I had to guess about age, as I could only find one glass and there was little info. I think it's safe to say they are "Rare". They are 4"x 3" and hold approx 6 oz.