Help - unusual Georgian era hallmark?

[owendobson]

Can anyone help me identify this hallmark - it appears on a boxed knife & 3 prong fork set (handles are green ivory?). Believe to be Georgian era.

[nigel le sueur]

if you mean the date letter it is for 1792 Sheffield, and the head is the duty head of George 111

[owendobson]

Thanks very much for your help, I am grateful.