Postby buckler » Tue Jan 29, 2019 4:48 pm
Can you check with your correspondent that the rather blurred punch at the bottom ( and slightly right of centre) is not a duty mark ?
It looks more like a George head than a leopards head, which would shift the date up 40 years to 1820.
Not that it would help us much there seems a conspicuous lack of SU marks in two lobed punches in Grimwade . Perhaps not London ?