Ethiopia 1936 envelope to Holland / Postage Dues

Red Cross Cover headed "Croix Rouge Neerlandaise Mission en Ethiopie" bearing Scott 237, 4 gur violet tied by Addis Abeba datestamp with Boxed 10 Censor, underpaid with Netherlands Postage Due SGD444, 5c blue applied on arrival by Amsterdam datestamp. Very fine item. (pt)    ID: 11778