Hong Kong. (Field Post Offices). 1950. Registered Air Mail envelope addressed to London bearing Great Britain SG 487, 1 1/2d pale brown (block of 4) and SG 503, 1/2d pale orange tied by 'Field Post Office/701' double ring with registered label 'FPO D.S. No 701' and London arrival. Nice item from the overseas forces in Hong Kong.