How can I check on the basis of the serial number whether a used-bought Montblanc Meisterstück has been stolen?

On the basis of the serial number it can only be traced to which country or to which dealer Montblanc originally delivered the writing instrument. A central list of writing instruments reported stolen Montblanc does not keep. Information on this can at most be given by Montblanc itself; a theft check via the serial number is de facto not possible.