This is a Parker 51 Aerometric finished in Black with a Rolled Gold cap. Made in the UK, this is a nice example of this classic pen which dates from around 1965.
The pen is fitted with the reliable aerometric filling mechanism which has been fully serviced. It is fitted with a lovely smooth Broad nib and is in overall very good condition with only light wear marks and scratches commensurate with use. The cap is in 'OK' condition with some light indentations and marks and a little plating loss around the lip.
This is a lovely writing pen, it has been well used and loved so the the cap isn't the best one I have seen but it is still very usable.