Dutch Ring?

Hi everyone and thanks in advance for your help.

My nan gave me a ring to list on eBay and as I was cleaning it what I thought was a dent in the band is actually a mark.

It looks like a sword which I have been able to find out on the internet probably means it is dutch but I am finding it really hard to distinguish the other marks on it - looks like it could be an R, W, H and a 10 underneath?!

Any help you could give me in finding out more about this ring would be very much appreciated - I am intrigued!
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The sword is for the Netherlands.
If there are no numbers in the sword then it has been made before 1953

I have checked a website zilverkeuren.nl ( this site is in Dutch only) and nothing is coming up with the letters and the number 10 combined. The three letters combined is not showing any results either.