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''Sarastro'' is the name of a silversmith/jeweler in Pforzheim (the company remained active until 1986) known for the production of silver [[overlay]]s present on many [[Montblanc]], both for early [[safety]] and later models. Its coatings, decorated with engravings and  high quality ''[[guilloché]]'', are of absolute value. ''Sarastro'' is in fact considered the [[Montblanc]] "official" jeweler with regard to the decorations of precious metal, and a [[Montblanc]] with its coating is considered original production. These [[overlay]]s are easily recognizable by the presence of a punch with a ''"S"'' in the marking of the metal titration, as in the photo at left.  

''Sarastro'' is the name of a silversmith/jeweler in Pforzheim (the company remained active until 1986) known for the production of silver [[overlay]]s present on many [[Montblanc]], both for early [[safety]] and later models. Its coatings, decorated with engravings and  high quality ''[[guilloché]]'', are of absolute value. ''Sarastro'' is in fact considered the [[Montblanc]] "official" jeweler with regard to the decorations of precious metal, and a [[Montblanc]] with its coating is considered original production. These [[overlay]]s are easily recognizable by the presence of a punch with a ''"S"'' in the marking of the metal titration, as in the photo at left.  

==External references==

==Riferimenti esterni==

* http://www.penexchange.de/english/sites/klassiker/overlay.html

* http://www.penexchange.de/english/sites/klassiker/overlay.html