Art Deco style vintage, possibly antique, sterling silver and marcasite brooch with central lapis lazuli plaque

Beautiful Art Deco style vintage, possibly antique, sterling silver and marcasite brooch with central lapis lazuli plaque. This is really beautifully and we would not be surprised if this was in fact circa the Art Deco period. However the assay marks for this indicate that it entered London’s assay system circa 1906-1998, more specifically with the year code it appears to have been imported circa 1991. 

Almost certainly Continental European in origin. 

Price marked at $240 AUD.

Measurements: 5.5 by 2.2 cm.

Excellent vintage possibly antique condition. No chips or cracks to stones and all intact, but light area of wear to central lapis plaque, not noticeable unless upon close inspection.