Arts and crafts Copper water jug 1940s?

Arts and crafts Copper water jug. I believe this to be 1940s lovely pertina and by renowned arts and crafts designer Joseph Sankey and sons? Unfortunately the bottom where the name etc would be stamped has rubbed off. This is a particularly large example 32cm tall 17 cm diameter at base with the crocodile snake or lizard skin pattern. Sankeys were a firm based in Bilston, Staffordshire and Wellington, Shropshire, "If it was made out of metal, they made it." Sankeys were popularly known for their domestic hollow-ware,