Large Vintage Sterling Silver Oval Brooch Shop » Silver Jewellery » Large Vintage Sterling Silver Oval Brooch Large Vintage Sterling Silver Oval Brooch By the Canadian company - Burkhardt. $69.00 1 Beautifully engraved brooch/pin measuring 2 1/4″ x 1 5/8″ (5.7 x 4.1 cm) and weighing a total of 11.0 grams. Stamped.