This is a Parker 51 Aerometric finished in Grey with a Rolled Gold cap. Made in the USA, this is a very good example of this model from the mid 60's.
The pen is fitted with the reliable aerometric filling mechanism which has been fully serviced. It is fitted with a lovely Broad nib and is in overall excellent condition with only very light wear marks and scratches commensurate with light use. There is one very small ding in the cap, just below the clip.