Staffordshire Washbasin & Bowl

My mother-in-law gave me this real pretty Washbasin & Bowl that is a light green color with gold trim and it has a picture of a man and a woman under a tree on it. Underneath the bowl, there is a marking that says Staffordshire Ironstone and it has a crown on it with NW on one side of it and YW on the other side of it and with EngLand above the crown, and underneath the picture there is a marking that says NWAO STAFFORDSHIRE YWAO IRONSTONE and then there is a picture of a Bird above a flame and with the word ENGLAND above its head. My mother-in-law bought it from a lady that was having an Estate Sale. She told my mother-in-law that it was in her family for a very long time.

Good