If Purdey gave you that information on the gun from its serial number the chances that it is a low value Belgian or Birmingham made look alike is extremely slim. And lets get things in proportion! The name Purdey and a gun carrying the name has something that very few other guns and makers have, a certain Je Ne Sais Qui and more so from the very early days of Purdeys. There are not many people who are lucky enough to own a Purdey for a start, find yourself a recommended Gun Smith specialising in Antique & Vintage British first line makers and listen to what he has to say, use the right craftsmen or you may find yourself learning an extremely expensive lesson in more ways than one . If you can afford to have the gun restored by all means do so eventually in time you may even break even, and how can you put a price on when someone asks what make is the gun, and you reply Purdey!