The Kingdom of Thailand (before 1949 it was known as Siam) is situated in southeast Asia. To the east it is bordered by Cambodia and Laos, to the north and west by Myanmar and to the south by Malaysia and the Gulf of Thailand. Its capital is Bangkok.
Siam issued its first stamps in 1883 and in 1885 joined the Universal Postal Union and started its own international postal service. Many stamps issued just after 1887 command very high prices due to many errors such as double printing, reverse printing, omission of characters etc. Philately was never a popular pastime in Thailand but as a result of Thailand’s economic growth over the last few years, more Thais have the time as well as the resources to choose philately as a hobby and as a result the Thai stamps have become more valuable.

1910
King Chulalongkorn Series
SG # 141
Used (Hinged)
SG # 143
Used (Hinged)
SG # 144
Used (Hinged)
1912
King Vajiravudh Series
SG # 166
Used (Hinged)
SG # 167
Used (Hinged)
SG # 168
Used (Hinged)
SG # 169
Used (Hinged)
1914
King Vajiravudh Series (Surcharge in English and Siamese)
SG # 165
Used (Hinged)
SG # 160
Used (Hinged)
SG # 161
Used (Hinged)
SG # 162
Used (Hinged)
1920
King Vajiravudh Series
SG # 211
Used (Hinged)
SG # 212
Used (Hinged)
SG # 214
Used (Hinged)
SG # 216
Used (Hinged)
SG # 217
Used (NH)
SG # 218
Used (Hinged)
SG # 220
Used (Hinged)
SG # 222
Used (Hinged)
1925
Air Series featuring “Garuda” Bird
SG # 231
Used (Hinged)
1928
King Prajadhipok Series
SG # 252
Used (Hinged)
SG # 253
Used (Hinged)
SG # 254
Used (Hinged)
SG # 255
Used (Hinged)
SG # 257
Used (Hinged)
1947
King Bhumibol Series
SG # 315
Used (Hinged)
SG # 317
Used (Hinged)
1951
King Bhumibol Series
SG # 340
Used (Hinged)
1961
King Bhumibol Series
SG # 422
Used (Hinged)
SG # 427
Used (Hinged)
SG # 428
Used (Hinged)
SG # 434
Used (Hinged)
1963
King Bhumibol Series
SG # 476
Unused (NH)
SG # 477
Unused (Hinged)
SG # 478
Used (Hinged)
SG # 479
Used (Hinged)
SG # 480
Used (Hinged)
SG # 481
Used
SG # 482
Used (Hinged)
1965
15th Royal Wedding Anniversary Series
SG # 522
Used (Hinged)
International Correspondence Week Series
SG # 524
Used (Hinged)
1966
International Correspondence Week Series
SG # 547
Used (Hinged)
1969
Export Promotion and 2nd Technical Conference of the International Tin Council in Bangkok
SG # 630
Used (Hinged)
Thai Ceremonies and Festivals Series
SG # 633
Used (Hinged)
Productivity Year Series
SG # 640
Used (Hinged)
1970
3rd Anniversary of Thai Satellite Communications Series
SG # 642
Used (Hinged)
1972
King Bhumibol Series
SG # 698
Unused (Hinged)
SG # 700
Used (Hinged)
SG # 701
Used
SG # 702
Used (Hinged)
SG # 703
Used (Hinged)
SG # 704
Used
SG # 705
Used (Hinged)
SG # 710
Used (Hinged)
1973
King Bhumibol Series
SG # 1032
Used
SG # 1032a
Used (Hinged)
1975
Silver Wedding of King Bhumibol and Queen Sirikit Series
SG # 833
Used (Hinged)
King Bhumibol’s 48th Birthday Series
SG # 876
Used (Hinged)
1977
Sai-Jai-Thai Foundation Day Series
SG # 924
Used (Hinged)
Thai Folk Dances Series
SG # 933
Used (Hinged)
World Rheumatism Year Series
SG # 943
Used (Hinged)
1978
Children’s Day Series
SG # 944
Used (Hinged)
9th World Orchid Conference Series
SG # 952
Used (Hinged)
United Nations Day Series
SG # 975
Used (Hinged)
1980
World Health Day Series
SG # 1022
Used (Hinged)
King Bhumibol Series
SG # 1179
Used
SG # 1041
Used (Hinged)
SG # 1040a
Used (Hinged)
King Rama VII Monument Series
SG # 1051
Used (Hinged)
1981
Birth Centenary of King Vajiravudh Series
SG # 1056
Used (Hinged)
Birth Centenary of Luang Praditphairo Series
SG # 1074
Used (Hinged)
United Nations Day Series
SG # 1080
Used (Hinged)
1982
Children’s Day Series
SG # 1087
Used (Hinged)
Bicentenary of Chakri Dynasty & Bangkok Series
SG # 1095
Used (Hinged)
SG # 1096
Used (Hinged)
SG # 1097
Used (Hinged)
Bangkok, 1983 International Stamp Exhibition Series
SG # 1107
Used (Hinged)
International Correspondence Week Series Featuring Corals
SG # 1151
Used (Hinged)
1988
King Rama IX Series (in King’s Own Bodyguard Uniform)
SG # 1340
Used (Hinged)
SG # 1343
Used (Hinged)
SG # 1354
Used (Hinged)
1996
Maghapuja Day Series
SG # 1830
Used (Hinged)
King Rama IX Series (In Admiral’s Uniform)
SG # 1903a
Unused
SG # 1903b
Used (Hinged)