Ballpoint Pen Guilloche ChevronGuilloches ornamental patterns of fine, engraved lines originally adorned precious watches and accessories such as the legendary Faberge eggs. Graf von Faber Castell uses this traditional jewelling technique to transform the writing instruments in the Guilloche series into true pieces of jewellery: The precious resin barrel is given a filigree pattern line by line and then further refined in manual lacquering and polishing processes.