Hi Elizabeth,

Thank you for contacting Mearto with your appraisal inquiry.
G&S Co were in London, so I'm not certain what was made in Sheffield - do they all have the same mark? I've valued everything as if it were electroplated so if there is any sterling in this group (such as the tray), please let me know as that will increase the value.
Based on the photos and information provided, and subject to examination, this is:

A near antique Goldsmiths & Silversmiths Co electrosilverplated tea and coffee service
London, 1900-1950
Comprising: a coffee pot, tea pot, cream pitcher and sugar bowl, with associated silverplated oval tray
coffee pot 7 1/2 inches high, 9 inches wide
CONDITION: all appear to be in good condition
PROVENANCE: service a wedding gift; tray purchased separately.
$400-600 for the entire set*
*represents a fair-market value for auction purposes; retail or asking price may vary.

Please let us know if you have additional items to appraise, and thank you again for using Mearto.