It is the Meisterstück 164 ballpoint from the Solitaire Doué range with a cap of gilded 925 sterling silver (vermeil) and a body of Bordeaux precious resin. The model number 164 gives thereby only the size and does not stand for the year of manufacture. Solitaire editions belong to the more valuable writing instruments of the brand; the exact year of manufacture cannot be derived from the number; the model should however come from the last years of production.