If the description does not clearly identify the model as a 149 and the nib does not fit the rest of the construction (for example 14C embossing on a supposed 146), one should for safety reasons keep one's distance. With real new Meisterstück nibs, the edges are covered with gold and the centre with platinum. Particular caution is in order when a seller uses foreign photos, e.g. pictures stolen from fountainpen.de; such auctions are ended via the eBay VeRO programme. Generally it is recommended, when buying, to accept only own photos and plausible seller histories and in case of doubt rather to acquire directly from trustworthy collectors.