Ballet Russes, Diaghilev, enameled metal plate

From the famous 1914 photo or Vera Fokina and Mikhail Fokin in the ballet 'Scheherazade', Stockholm, 1914. (Costumes by leon Baskt), a very interesting and stunning quality enamel on metal plate.
Signed (unreadable) lower left corner.
Circa 1920 ? 1930 ?
18cm 13cm.
Excellent condition.