explains that dating pianos purely on the basis of numbers is often not as simple as it seems. If you want to search inside the piano for clues, have a look at
Are you able to post photos here to show us what the whole piano looks like?
I will look up Charles Vincent, any idea what part of the country it would be? Or what country? Dealers sometimes called themselves "selectors", implying that they selected the perfect piano for an individual client. Again, photos of the label would be useful.