Lot 30511 – 1866, 50r blue, featuring the « filigrana de sutura »

1866, 50r blue, featuring the « filigrana de sutura » (« suture » or « stitch » watermark) vertically and horizontally in two single examples, cancelled in black and blue, usual toning and one stamp with natural paper wrinkle mentioned for accuracy; an exceedingly scarce duo. Ex Dr. de Amaral Machado.

Note: The « suture » watermark is caused by the splicing of the felt that carried the wet paper -during the process of its manufacture-, which was made with metallic threads. It is an accidental filigree with the appearance of a suture, when the stamp is examined in benzine.