Fairbairn's Crests translates the motto as "To pursue the track of my ancestors," and ascribes it to Bayning, Powlett, and Townshend.
The coronet above the coat of arms is that of a Baron.
The arms appear to be those of a younger son of the Viscount Townshend, which are identical except for the mark (possibly a five-pointed star? for a third son) in the middle. Given the dates for this silver, it may be one of the sons of Charles, 3rd Viscount Townshend, b 1700, d 1764. Yet the younger sons of the 3rd Viscount each died before the date of this silver.
The eldest son, George, b 1724, succeeded his father as 4th Viscount (he was created the 1st Marquess Townshend in 1787)
Charles, Chancellor of the Exchequer 1766, d 1767.
Edward, d 1731
Roger, killed at Ticonderoga 1759
I suspect the dates of birth of the grandsons of the 3rd Viscount are too late for the dates on the silver, as they would have been in their teens, the eldest having been born in 1755.
The arms of Viscount Townshend are blazoned: Quarterly: 1 and 4, Azure a chevron ermine between three escallops argent (for Townshend); 2 and 3, Quarterly gules and or in the first quarter a mullet argent in the center a crescent sable (for Vere).
I hope that this information is helpful.