Hello Baz69, yours is the stamped version with trademark on the one and writing on the other side which is doubtless original period 33-45. What I understand is that the discussion concerns the large, etched trademark only on one side of the blade.
CLEMEN & JUNG had some varations concerning their trademark and how it was placed what we know best from their hunting daggers but the etched ones on navys are highly controversial. Billy G has already said all what can be said about the problem and it is also all what I do know about it.
Regards,

wotan, gd.c-b#105

"Never look for sqare eggs" as a late owner of an original FHH-dagger used to say.