Spoon identification

My partner was given a tea spoon that used to be her grandads that has some marks on it. I’ve tried looking online but can’t find any of them could anyone help identify them please?

I’m not sure how clear the letters will be in the picture but they are F.W N S

Although I don’t recognise the marks it is most probable that F.W are manufacturer’s initials and NS stands for nickel silver; this is a base metal alloy which, perversely, contains no silver. It is a white metal similar to pewter and normally comes in its electroplated form EPNS.