This is a Parker 51 Aerometric finished in Black with a Lustraloy Cap. It was made in the UK around 1955.
The pen is fitted with the reliable aerometric filling mechanism which has been fully serviced. It is fitted with a superb Medium Italic 14ct gold nib and is in overall excellent condition with only very minor wear marks commensurate with light use. The Lustraloy cap is in good order with no dings.