Recognisable are counterfeits, among other things, by a black star on the packaging as well as by the inferior packaging quality overall. There have, however, also been very well-made fakes without these obvious hints sold, e.g. by an American provider who earned around 160 US dollars per stand. Even experienced collectors have already fallen for well-made fakes like the Greta Garbo. Therefore: always compare carefully and inform oneself thoroughly before purchase.
Related pages on fountainpen.de:
• Patron of Art Lalique (1991): fountainpen.de/patron-lalique-en.htm