Here is a lovely trefoil brooch by the illustrious Danish silversmithy Hansen (see bio). I believe that this brooch, which I have never seen before, is a very early design by Karl Gustav Hansen, and probably one of his 'Future' series, designed in the 1930s.
Condition: Excellent, no visible damage, rollover safety clasp
Marks: 925S HH monogram, Denmark
Size: 1.5" (3.8cm)
Year: 1930s or 1940s