On the Doué, the characteristic feature is the multitude of fine notches on the doué element, similar to the Lennon, but not as thin; if these notches are missing or upper and lower part appear too plain, that is a clear counterfeit indicator. A serious purchase decision requires high-resolution photos as well as concrete information on the serial number in the clip and engravings on the upper part. With a sparse description and evasive seller answers, a purchase is to be advised against. With the StarWalker series, high-quality fakes are also in circulation by now, which is why caution is warranted.