A Signet "Mastiff" gold handle, carved and polished decoration engraved agate seal with the coat of arms of the marquesses of Marialva, Masters of the Horse of the Portuguese Royal Household supported by a horse with harness European 18th/19th C. green dyed shark skin original case without mark, pursuant to Decreto-Lei No. 120/2017, art. 2, paragraph 2, point C. Dimensões (altura x comprimento x largura) - 3,5 cm; Peso - (bruto) 38,5 g.