From Grimwade
Address: Exeter Change. Second mark, in partnership with John Kelly
Perhaps not so much a silversmith, more of an Organ Builder:
FLIGHT, Benjamin (1767? - 1847), Organ Builder, was the son of Benjamin Flight, of the firm of Flight & Kelly, Organ Builders.Source:
Dictionary of National Biography - Volume 7 - 1889
FLIGHT, Benjamin, an eminant organ builder, born about 1767, was the son of Benjamin Flight, who, in the later part of the last century, carried on, in partnership with John Kelly, under the style of 'Flight and Kelly,' the business of organ building at Exeter Change.Source:
A Dictionary of Music and Musicians - Volume 1 - 1879
The Flights seem to have been responsible for setting the manufacture of barrel organs onto a commercial footing, and it is said, Benjamin Flight, senior, pioneered the introduction of the barrel organ into churchesSource:
The Making of the Victorian Organ - Nicholas Thistlethwaite - 1999
Presumabley marks were entered at Goldsmiths' Hall for the hallmarking of silver embellishments that were attached to the instruments.