An Art Deco silver diamond plaque brooch, centring an approx. 0.64ct. Old European cut diamond (chipped) flanked by 2 old European cut diamonds totalling approx. 0.50ct (1 chipped), all P2 clarity, to a pierced surround set with 76 old mine and old European cut diamonds totalling approx. 4.00ct, SI -P3, size 19 x 60 mm, wt. 8.04g. TDW approx. 5.14ct, with Val.