I have a large soup tureen...Old Britain Castles pattern in the blue color. It has the ususal crazing from aging and at one time there was a repair done on one of the handles, other than that it is in excellent condition...On the bottom of the tureen it says "OLD BRITAIN CASTLES" Made in England by Johnson Bros, All Decorations Under the Glaze, Permanent & Acid Resisting Color, A Genuine Hand Engraving. And there is a capital A in black under the lid. The castle on the top of the lid is "Berry Pomeroy Castle" 1792 and on the side of the tureen is "Raby Castle" 1792. I would like to know the approx date it was made and the value on today's market.Thank you for your help. Becky