cover ½r. bright ultramarine (exceptional shade) showing frame break at right, with 3.5mm. margin at top and 1.5mm. at right, very close at upper left on front from Guaranda to Riobamba, tied by lozenge h.s. with despatch c.d.s. adjacent and ½r. ultramarine with 3mm. margin at foot and good margins on other sides on cover from Guano to Riobamba. A very fine pair