An original StarWalker carries under the clip the imprint 'Pix' or 'Germany metal pix'. Earlier examples had a longer inner cylinder for accommodating the refill; the absence of a serial number is therefore not yet an unambiguous proof of counterfeit. For reliable assessment, it is recommended to present the device to an authorised Montblanc dealer or a brand expert. A direct comparison with the comparison pictures published on the community page is additionally helpful.