On the Writers Editions, the total number of all produced fountain pens is engraved, with the first examples of every edition reserved for the three-writing-instrument sets. Serial numbers are not assigned twice; a change of the numbering logic has never taken place. Edition sizes vary from edition to edition (e.g. Faulkner 16,000, Kafka 18,500, Wolfe 16,000, Collodi 12,000). Confusion arises because the Montblanc website lists partly only the individually sold pens, partly only the sets and partly partial quantities; what counts is always the figure engraved on the writing instrument itself.