This is an excellent Parker 51 Aerometric Demi finished in classic Black with a Lustralloy Cap. It was made in the UK and dates from around 1960. The Demi is a few mm shorter than the standard 51 Vac but retains the same diameter. Many people find the Demis to be very well balanced.
See the last photo for a comparison between the demi and a standard 51.
The pen is fitted with the reliable aerometric filling mechanism which has been fully serviced. This pen is fitted with a Fine nib which writes smoothly.
There are no deep scratches, marks or cracks and the pen is in very good overall condition with no dings to the cap and only minor marks and very light scratches to the barrel.