W.N.FROY aka William Nathaniel Froy. 

There are quite a few of these taps in existence.
And it’s quite easy to think that they must have something to do with the modern manufacturer Lefroy Brooks.
But Willam died back in 1897…
In fact there is quite a history to the family business that you can reserch here –

https://www.gracesguide.co.uk/W._N._Froy_and_Sons

https://www.gracesguide.co.uk/William_Nathaniel_Froy

Speak to Keith on 07583 406 571 if you have a similar project for restoration.