A milk jug D. Maria I, Queen of Portugal (1777-1816) silver engraved decoration with "Meander pattern and plant motifs", centre engraved with the initials A B and a nobility coronet Portuguese small bruises maker's mark of António Firmo da Costa (1793-1824), without assayer's mark, pursuant to Decreto-Lei No. 120/2017, of September 15 - art. 2, no. 2, paragraph c) Dimensões (altura x comprimento x largura) - 16 cm; Peso - 430 g. Notes: vd. "António Firmo da Costa - Um ourives de Lisboa através da sua obra". Lisbon: Portuguese Institute of Museums - Dr. Anastácio Gonçalves House-Museum, 2000, pp. 38-39; and ALMEIDA, Fernando Moitinho de; CARLOS, Rita - "Inventário de Marcas de Pratas Portuguesas e Brasileiras - Século XV a 1887". Lisbon: IN-CM, 2018, L-86