This is a Shelley, England saucer only dated 1932-1940 in an art deco hand painted unamed golden yellow and black dots pattern number 12104 in the deco Round or Regent shape.

The saucer measures 5.25 inches in diameter.

The saucer only is in excellent used vintage condition with no chips or cracks and basically no signs of use.  

A wonderful art deco design that isn't often seen, and I hope you have it's mate!

Spare saucers make wonderful and decorative soap dishes, candle holders, ring dishes for for lemon slices on a tea table at tea time.