The arms are those of Gardner, for Samuel Gardner and his second wife Elizabeth (Clark Winslow) whom he married in 1758. Samuel Gardner (1712-1769) was a sucessful Salem merchant. His first wife Esther Orne died in 1738. Elizabeth Gardner had been previously married to William Winslow (1707-1746), the son of silversmith Edward Winslow, before her marriage to Samuel Gardner. In the year after Gardner's death she married her third husband Francis Cabot, a prominent Bsoton merchant.
A matching cann by Coburn engraved with the Gardner arms and the initials G over S*E is in the collection of the Museum of Fine Arts, Boston. Samuel Gardner's inventory lists a pair of canns weighing 27oz 2dwt, which most likely refers to these two canns. The collection of the MFA also includes a 1750 teapot by Coburn engraved with the Gardner arms within a similar rococo foliate cartouche and with the initials S*G.