The terms Special Edition, Limited Edition and Artisan Edition are used differently at Montblanc. Special Editions are produced only with a temporal restriction; the quantity, however, can be freely chosen by Montblanc within the production period — many or few writing instruments may be made. Examples are the Special Anniversary Edition produced only in 1999 and the Menuhin Edition, whose production period was not infinite, but whose exact quantity is unknown. Limited Editions are restricted both in production period and quantity. An example is the Patron of the Arts Edition J.P. Morgan 2004: the writing instruments were produced only in 2004; afterwards the moulds were destroyed; the edition was 4,810 pieces in the regular variant and 888 pieces in the solid-gold version. Artisan Editions are extremely rare and generally very expensive writing instruments produced only in quantities of 1, 4, 10 or under 333. An exception are editions like Jungle Eyes as somewhat more regular variants. A typical example of an Artisan Edition is the Carnegie Ruby Edition based on a Carnegie of 2002 and set with rubies.