Zorro and smiling-knife,
I got a British pattern No: 6353/1905 clasp knife today. I had a chat to Dutchy about it and verified what I purchased (maybe a bit of skyting about the price ).
It does not have any broad arrows or numbers on the marlin spike (does that mean it was a "civie" version? or they were lazy?)
The only markings are the makers mark
H G LONG
I have googled H G Long and they were/are a knife maker.
Any other info would be appreciated.