It's probably quite a lost hope but I was hoping some kind folk might help me to identify a lovely celluloid fountain pen I bought recently very cheaply. I suspect it's just a 'junk' pen but it's very attractive and blessed with a 14k warranted nib no. 6 which writes like a dream with flex xf - bb. It has no identifying marks at all except on the clip which offers me "pat no. 83573", which I suspect refers only to the clip type. It's a shortie at only 4.5" capped but it's such a sweetie it would be lovely to put a name to it. I'm new to pens, so hoping wiser heads might give me a clue. Couple of pics...