In addition, the clips are plated over a brass base and are die struck, resulting in a negative image on the back. In most examples, the filler will be the standard aluminum speedline filler used on the Vacumatic line of the time, although not all "first year" examples have the speedline aluminum filler.New Old Stock examples can be found with correct plastic filler, and some may have been switched as the result of a repair.Some collectors will assume that a "first year" pen without the aluminum jewels is not correct. One does find with regularity "first year" pens with plastic jewels.
They can be easily distinguished from later production by several unique characteristics.
In addition, I have been able to inspect a demonstrator with the "1" imprint by the clutch ring and a rounded blindcap.
In addition, in most, but not in all cases, the "first year" pens will have jewels made of aluminum.
One well known collector once said to me "there are more so called "first year" pens out there than Parker ever made".
The picture to the left shows an early "First Year" pen with a ribbed hood, similar to the pattern found on the pencils.