Puckerings has dated this piece to the 1930s.
Each is fully hallmarked for Birmingham 1929 together with the makers mark for Charles S Green.
This jeweller is still in business under the name Boodles and was established in 1798 and

steered by six generations of the same family for over two hundred years.
A very special find in superb condition each measuring 2 5/8" square x 1/2" tall; the case measuring 6 3/4" x 3 5/8" x 1".
Item ID: 40794
FREE Worldwide Registered Airmail Directly From London, England
Puckerings has dated this piece to the 1930s.
A quality online collection of fine english antique smalls with free worldwide shipping from london, england
You can view the stock and full dealer information on the Puckerings Profile Page