simoncpage So a new key acquired and preliminary clean. This key has created lots of questions: I have found the same key in William Wallace’s book so can date it roughly albeit I’ll get to that. But the key is identical. I have 5-6 keys with this similar bit shape which are all GR period or obvious linked to a royal cipher. Does this shape and the numbering have a significance? Was this an issue number? The writing on the side says JEPHSON ESQ No333. This I assume is: https://en.m.wikipedia.org/wiki/Robert_Jephson Would anyone know why he would have a royal cipher key (Parliament?) and if so what period would you date it based on this? What is the significance of the GR hanging from what I can see it serves no purpose and gets in the way? Any info would be really useful. Thanks