These Parker 61 Pencils are quite rare in this condition, probably because most of them were used extensively as they were reliable and of exceptional quality.
This one is in very good condition, it has a frosted Lustralloy cap and a black barrel. The pencil has only very light marks and scratches commensurate with light use. The mechanism works perfectly and the pencil takes standard 0.9mm leads which are still readily available.
This is the Mk1 61 with the pearl jewel in the end of the cap, the later ones had a plated steel clip screw.