It appears to be a Fred Perrin Juniper Griffe neck knife (Google it). I am not aware of any engraved models, so this may have been done by another individual. The engraving would have most likely covered up any maker mark, as Perrin definitely stamps his blades.
NOTE - it could also be a cheap knock-off from Pakistan as well, although the engraving is rather crisp and fairly-well executed and not typical of most fakes. Hard to say without actually seeing the knife in person.
Is there a sheath for it?