Thailand. 1948. Registered Air Mail envelope addressed to England bearing SG 259, 80s black and light blue, SG 261, 2b brown and carmine, SG 313, 5s violet, SG 315, 20s purple and SG 327, 50s green tied by Bangkok date stamp with matching registered label with bilingual 'Opened By Customs; label in blue-green. Very scarce use label