Mercedes-Benz engraved on clip
Promotional pen- Silver electroplated with blue coloured stone on the top of the cap
Condition: Pre-owned. There are some black spots: The black spots all over an electroplated silver pen are typically silver sulfide (tarnish) caused by a chemical reaction with sulfur compounds in the air, or base metal bleed-through where the underlying metal is corroding through pores in a worn or thin plating
in most vintage Ballpoints, the refills are dry and have to be replaced.
The Parker Style G2 / The GEL version of this refill is available / twist action