Hello,
Webley as a company ceased to excist in 2005; likely the production of the Tempest stopped (much) sooner, but on this forum there are members with more and authoritive knowledge.
Some Tempests (and Hurricanes) have no number at all.
I found these in the black boxes, I assume of the early 80's, while those in plain (brown) corrugalated carton carried numbers again left above the trigger, while that number was stamped also on the box.
Could be a coincidence of course, and all this occurred in the Netherlands.
Is there some conclusions to be made out of that book on these pistols?
Regards,
Mike Meijer