Hi,
Not much to add I'm afraid, except to say that the overstruck mark may well be of overseas origin. The clue that prompts that thought is the orientation of the crest, the fact that it faces away from the bowl is sometimes found on continental silver, but very rarely on British pieces. 'WY' therefore is most likey indicating that the hallmarks on this spoon equate to the 1st standard in his/her country.
Tuberville was certainly not the maker of this spoon, his working career was yet to come. The 'EH' mark has been noted before on spoons but as yet their identity is unknown.
Sorry if my thoughts disappoint, I, like Clive, would have loved it to have been Yardley, but I cannot connect the two. Hopefully another member has some thoughts regarding this interesting set of marks.
Clive, I came across this avertisement from 1862, interestingly they claim 1770 as the date the perfume business started. The address is a Bloomsbury one as was the Thorney Street one.
![Image](http://i54.tinypic.com/2mpg689.jpg)
Yardley & Statham - London - 1862
Trev.