A beautiful rare Nils Westerback designer Helky Juvonen silver brooch, made in Finland.

Marked 'U7' for1973, 'NW', a crown mark in a heart shape, 925 for sterling silver. 

Approximately 7 cm length, and 3.5 cm at widest point. 

The brooch has a texture and form like a lovely old piece of gnarled tree bark. 

Fastens with a simple pin and hook. A fabulous example of modernist jewellery