i have this fork and don’t know anything about it 
please help to identify it
Hi, I’ll start the ball rolling and hopefully others can fill in the blanks. The maker is Elkington Mason & co. This company existed, I think, between 1842 and 1861. I think Elkington secured the patent for the electroplating process in 1842, maybe a year or two earlier. Elkington were one of the few (only?) electroplate manufacturers to use a date coding, starting in 1848 with ‘K’, similar to the English hallmark convention. So if my reading is correct your fork dates between 1848 and 1861. I can’t make out the letter, I’m assuming it’s a letter, in the lozenge shaped punch. That letter would date it precisely.
Hope this start helps.
Tony
The punch shape (square with cut corners) indicates a date between 1865 and 1885 and the date letter appears to be T which makes it 1879. And I will just emphasise, as Tony said, that this is electroplate and not silver.