I am trying to identify where this teaspoon was made and if possible who the maker might be. The shape of the spoon is typical English Hanoverian and I would say it dates 1740/50. However - the front of the stem has a reeded edge and there is a moulded leaf? design at the end of the handle and there is an engraved crest below this of a griffin emerging from a crown. There is a tapering groove all the way down the back of the stem and hence no space for hallmarks. There is a maker's mark only, stamped to the drop on the back of the bowl - possibly IS below a crown. Hoping it may be English, but could be European. Many thanks!!
![Image](https://www.925-1000.com/pics/Ximg.jpg)
![Image](https://www.925-1000.com/pics/Ximg.jpg)