No. The serial number Montblanc stamps into the clip ring follows an internal code that has never been published. Only the manufacturer can decipher it; collectors cannot derive a production date from it, and enquiries to customer service do not as a rule yield the year of manufacture either. Anyone wanting to pin down the period has to work from design features.
The most telling of these are the filling system, the form of the clip and cap rings, whether a model number is stamped into the cap ring, the execution of the star in the cap crown, the engraving and the alloy of the nib — 585 or 750 gold, in one colour or two — and the material of the body. Set against the collectors' literature, in which the models are arranged by production period, these will usually narrow things down to a window of a few years. It becomes exact to the year only where a receipt, a guarantee card or a dated dedication engraving survives.