Thanks again for all the help, I have found this all interesting.
I have two more spoons, which I think must been even older, just singles. They seem to have been stamped by the owner and have been handled/polished so much that hallmarks are mere shadows.
CWS - I wonder if this was a WS Cordley;
HG - I wonder if this was the father of Elizabeth Guy - Henry Guy 1764-1809
I wonder about the GUY family (Elizabeth is my G3 grandmother). I have also inherited a sampler she made in 1811. The spoons with initial EF I have assumed were hers - Elizabeth Guy, married Isaac French in 1819; she was b 1800 and died 1832 after having six children.
Assuming the spoons were from her family, they do look the most 'refined' and better quality than the others. Wonder if this reflects the family's status? As far as I can find out they were farmers, tenants not land-owners.
Anyway, this is what makes genealogy so fascinating!