Spalding simple chess set - WW2

A basic set made by Spalding in the UK during World War 2 - the registered design number dating from 1940-1943 (I haven't been able to narrow it down yet).  The set is housed in its original drawstring canvas bag.  Each piece stamped on the bottom - the white pieces with a different stamp to the black pieces.  "Pat applied for" under the white pieces, so this would be an early version of the set - whether a patent was ever issued is another topic for research.  If you can decipher what it says under the black pieces, please let me know!