The Gold filled Parker 51 was called the 'Signet' up until 1958 when it was renamed the 'Insignia', for some marketing reason. At the same time the reference to 'Superchrome ink' was removed from the filler sleeve, enabling this pen to be dated to before 1958.
The pen is in super, ding free condition. The surface is bright and the engraved longitudinal lines are still sharp. The clutch ring is the correct original, the groove is Gold filled.
The pen has been fully serviced and tested. The 14 Ct. gold nib writes with a very smooth medium line, perhaps a little on the fine side. Although the hooded nib design precludes any flexibility Parker somehow managed to give these nibs an 'easy writing', soft feel.
At the very top of the normal production for the Parker 51, the Signet was the most expensive and is now much sought after. It is rare to find one in such outstanding condition.