Of Montblanc three versions of the Greta Garbo models exist: two limited editions with 100 or 1905 pieces as well as the unlimited model with an ivory-coloured cap and matching ballpoint. The limited pieces always bear their individual edition number including the total edition as engraving. On the unlimited models, only a very small identification number, only legible with a magnifier, is located in the clip ring. A classical serial number as on old Montblanc writing instruments no longer exists on today's models.