Checking the Hall Marks with the Pewter Society data base we find these hallmarks represent the firm of Bolton and Wylde who traded from the Pepper Mill in Wigan from 1822 to 1835. So we could say this was made about 1829.
There is little market for Continental pewter in the British Isles, there is some in the USA. Chinese pewter interests some in the USA but has little following elsewhere, except in Chinese communities. Photographs. Photographs are all important in selling items of antique pewter. They need to be well lit and in sharp focus.