Netherlands East Indies. (Horse-Shoe Route). 1940. Air Mail envelope addressed to London bearing SG 404, 15c ultramarine and SG 412, 80c scarlet tied by Medan date stamp '24th July 40' with 'Censuur-Medan' label, endorsed 'British Overseas/ways Corporation/ (via Singapore & Durban) with London receiver '3rd Sep' on reverse. Very fine.