What is ROMAN SILVER?

I have a spoon marked ‘ROMAN SILVER’ followed by a sideways ‘W’ in what looks like an arrow point and 'BRAVINGTON KINGS CROSS LONDON.
What is ROMAN SILVER in this case please?
Thanks Alan

Roman silver was a trade name for a particular alloy, used as a base metal for electro plating. This is not actually silver, but one of the many names given to an alloy of copper, nickel and zinc, a popular base metal alloy for electro-plated silver.