I can't remember coming across a fancy back teaspoon of this design before, very similar to the 'shell and scroll' patten, but a single flower instead of the scroll.
![Image](http://i43.tinypic.com/2qinqr8.jpg)
![Image](http://i44.tinypic.com/r9n3vd.jpg)
![Image](http://i43.tinypic.com/4zycec.jpg)
![Image](http://i41.tinypic.com/2a9tm4x.jpg)
It's top marked, but only struck with the two marks that you would expect to find on a bottom marked teaspoon such as this. It shows no signs of any additional worn marks.
![Image](http://i39.tinypic.com/2vsoqo0.jpg)
The Lion Passant appears to me as one of those used at Exeter, as identified by Miles in his article http://www.925-1000.com/a_exeterlions.html" onclick="window.open(this.href);return false; under the 'Anomalies' section, although I am uncertain as to if the base is wavy or there has been a slight distortion over the years.
![Image](http://i43.tinypic.com/2yplsgk.jpg)
Presuming that it is indeed Exeter, then the maker would be Thomas Eustace and the dating between 1780-1784, outlining the shift between bottom marking and the addition of the Duty mark.
Other opinions would be welcomed. Also is the fancy back design unusual, or have I been walking around with blinkers on?
Trev.
.