I think I cracked this one for you. The words on the top and bottom are Superior : Quality, and the word running across the middle is warranted.
https://kovels.com/marks/pottery-porcelain-marks/circle-or-oval.html?eid=9144
http://gaukartifact.com/wp-content/uploads/2013/03/item_2409948.jpg
http://gaukartifact.com/2013/03/05/rare-watercolour-of-wedgwood-etruria-works/