I have just got this teaspoon dated 1853.
Maker GT with a crown above and maybe a fish under ?
Please move to another forum if you wish.
Any ideas appreciated. Bob
The mark appears to be that of Giovanni Tonna from 1806. There is also a Giuseppi Tonna (1849) and Guglielmo Tonna (1857) but their marks are different. Ref: Antique Maltese Domestic Silver - Jimmy Farrugia.