Command Performance - Vermeil (Gold Filled over Sterling Silver) - During World War II many common materials were generally reserved for the war effort. Fortunately gold and silver were not so there are a number of pens and parts from the period that are either solid gold, silver, or gold filled silver like this model. This pen is a less common pattern and has lines running the length of the pen. A more common variety has the lines running around the pen. There are several other more scarce patterns.