Well, I can tell you that the postage stamp on the scabbard is roughly correct for the period - being the image of George VI who reigned from 1937 - 1953, although what circumstance permitted the stamp to adhere to the dagger is something that I suspect we will never know.
It would appear that somewhere along its' life, this dagger has been in the possession of a Brit - or a foolhardy stamp collector! Such are the mysteries of this hobby!
FJS
