Thailand. (Malaya - Penang). 1940. Illustrated Advertising envelope (Universal Distributors for Watches) addressed to England bearing SG 282, 5s violet and SG 283, 15s carmine tied by Bangkok GPO date stamp '20th April 1940', routed via Penang with 'Em. 77/ (Crown) Passed By Censor' label tied by framed 'Passed By/ 13/ Censor' cachet.
Very attractive advertising cover from Siam.