Hi, I have acquired a bowl with a crystal insert which fits into a silver rococo (?) style base. I cannot find anything anywhere after hours of research as to the history etc of an older "Whitehill" silver manufacturer. Can anyone help identify the makers mark (I have checked the most recent Whitehill silver plate place which began in the early 1990's and the age letter on this item appears to be 1958?). I am a newbie to this type of thing so may not be totally clear on what I am trying to describe. Please see the photos and thank you in advance. The bowl size is 20cm long x 12 cm wide x 10 cm high if anyone recognises it.