Not a pen but a humble pencil, but one that might be interesting to share. This was found by a friend in a box in a drawer; but they can't recall when or where they got the box.
What was interesting was when I searched for it in Jonathan Donahaye's (RIP) online book of CS numbers, using his own category he categorised it as being the rarest and could provide no info other than that it was perhaps produced up until 1931.
It is, I think, vulcanite (but could be wrong) and in lovely condition, especially the gold highlighted imprint.
I searched for G&E Sayer, Eastbourne, curious as to what type of business it was, but Google came up with nothing .
Edited by chunya, 15 March 2018 - 11:21.