Gravity action Mordan that is 9CT gold. It has the gold markings on the barrel along with a hallmark but the hallmark is too rubbed to read properly. The letter appears to be an “s” which would make it 1913. Also stamped “Mordan & Co.” on the cap and “S M & Co” on the barrel. Mechanism is working to propel lead and the gravity mechanism is also in perfect condition.
"S. Mordan & Co.", "S M & Co", Hallmarked but hard to read (date appears to be 1913 ('s'))