13c, 1881 40r Yellow buff, Cliche of Mozambique in Cape Verde plate, Imperforate, block of 12 (4x3) with pos 6 the error, PO fresh, NH, Very Fine and choice, quite rare in imperforate form; 2019 PF certificate (the error listed but unpriced in Scott, the 11 Cape Verde issues have a Scott value of $440 as hinged singles) (Image)