A pictorial-style institutional bookplate in black and red ink on white paper, with a line border. The central image is printed in red ink in an oval, and is of a female figure holding a baby and wearing a crown. The baby is wearing a triangular hat, and the pair is flanked by two stone towers. Above is the text "Ano X da Revoluçcĩo Nacional," which translates from Spanish to "Year ten of the National Revolution." The date 28 de Maio is written on either side of the image, and below are the years 1936-1937. Beneath is the institution's name, Biblioteca Publica Municipal do Porto.