Thank you for your quick reply. I am no expert and as there are a few marks which will not clean out I thought it was silver plate.
The glass bowl measures 5.1/2" in diameter. All the marks I have shown are on the lid. The initails are
J.B on the lid.
There are the numbers 2221 on the tray with which look like the initials
I:R Here is a larger photo of the makers mark.
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