Vintage WWII British War Relief Society (BWRS) brooch with the emblem of a lion and shield and the motto "Dieu et mon Droit" ("God and my right").
The back of the pin is marked "Official BWRS and BB (Bundles for Britain) by Accessocraft U.S. Patent No. 123071". The patent is from 1940. This same pin appears on the cover of the Dec. 17 1940 edition of Look magazine. (Magazine NOT included, shown for reference only.)
It is in good condition overall, but it does have some chipped paint and general wear. It measures about 1 5/8" across.