Mordan gravity pencil. Mechanism works fine. Hallmarks are worn and difficult to read but “S M & Co.” is clearly legible on the barrel and “S. Mordan & Co.” along with two hallmarks is on the cap. The barrel hallmarks look like it could be London, c.1910. Very good overall condition.
"S. Mordan & Co.", "S M & Co", Hallmarked but hard to read (date appears to be 1910)