United Nations - UNESCO: METER MARKS 1947/1994 (approx.), Highly specialized and
United Nations - UNESCO
METER MARKS 1947/1994 (approx.), Highly specialized and very extensive collection of over 400 covers with meter marks from UNESCO in nine folders, sorted according to machine numbers and slogan postmarks, starting with 19 covers from the first franking machine SC 0865 from HAVAS, including...