Vintage Gray's Pottery Stoke-on-Trent England SHIP Mug

I love the mug's front which is graced with ship (Black & White), while the finish is a splashed lustre in purple with a strong copper sheen when rotated in the light, the copper tone comes through dominantly in an iridescent fashion. 

Gray's Pottery continued a long tradition of the use of verses on a wide range of products from the mid-1940s through into the 1950s. Many of the designs were destined for the North American market. This cup has their mark "N3" which was used from 1933-61.

Mug is 3.25" high.