Mourning jewellery around 1910 to 1920

Exclusive mourning jewellery around 1910 to 1920 - Small stylish mourning brooch; Art Nouveau; silver-gilt with 4 cut onyx stones; by the well-known maker "HEDBLOM - Sweden / Stockholm"; hallmarked several times on the back (see photo); Hedblom jewellery is a very popular collector's item and rare; pin intact; traces of use according to age (see photos); dimensions: approx. 4.5 x 6 cm / 10.77 g