Here is a pic of the brand new (old stock) Jeffery leather trade label I acquired many years ago,
from an out-worker supplying gun-cases to the trade. I am guessing the Jeffery orders had long since dried up,
and iirc the widow was selling off stuff from the workshop following the death of the case-maker.

Unfortunately, my .400NE double is engraved with the Golden Square address.
...but hey, very few admirers would notice that!