Many thanks for sharing this piece with us.
In case you are not aware, here are a few notes on Thomas Watson. He was the son of Joseph Watson, a clogmaker of Low Moat, Northumberland. Thomas was apprenticed to William Stalker for a period of eight years as from 1st January 1783, unfortunately Stalker had to retire the following year, probably because of ill health and Thomas elected to complete his term with Robert Scott. He was granted his Freedom on the 4th February 1793 and his working period was from 1793 until the end of 1845. He was Warden of the Newcastle Company twenty-nine times and was known to have taken on fourteen apprentices over the years. He died on Christmas Eve 1845, eight days after his last assay. He was survived by his wife, Jane, who died 14th January 1848.
Below is an advertisement from Thomas Watson published in the same year as your piece was assayed.
Thomas Watson - Newcastle - 1803
Advertisement source: The Newcastle Courant
, Saturday 12th March 1803.