cover 1916 (29 Oct.) XU5 to Tenerife, bearing 1916 stamps of Rio de Oro, 5c. on 4p. (violet surcharge), 10c. on 10p., 15c. on 50c. (2, red and green surcharges) and 40c. on 1p. (2, red and green surcharges), all inverted and tied by clear c.d.s.; small non-contemporary ink notation at lower right. Signed Bloch. Photo