The first number before the slash is the individual limitation number; the second the respective total edition of the individual writing instrument. On the Jules Verne, 16,800 fountain pens, 14,800 ballpoints and only 4,500 pencils were produced; the latter were offered exclusively in the set. The first 4,500 writing instruments of each variant were reserved for the sets; an individual number lower than 4,500 indicates that the piece comes from a set. When buying a set, identical limitation numbers on all writing instruments are to be ensured.