Sam Sen Nai Philatelic Museum has been established in 1947 as part of the Post and Telegraph Department. Today it belongs to the Thailand Post Co Ltd and is located at its present premises on Paholyothin road next to the Sam Sem Nai Post Office. The museum is keeping record of Thailand's stamp and postal history starting from the mid-1800s to the present day. Stamps usually tell the story of the history and culture of a society. Thai stamps follow this tradition and stamps in the Philatelic Museum in Bangkok have their stories to tell too.
The story begins during the reign of King Rama IV (1851–1868). In those days, before the existence of a postal service in Thailand, people sent letters through messengers or friends. 1880 members of the government felt an urgent need for a postal service for the general public. Prince Bhanurangsri was appointed the first Director General of the Post Department by King Rama V. With the establishment of the domestic postal service, Thailand issued its first postage stamp on August 4, 1883. It was called "Solot", after the price of the stamp in the then valid currency. On July 1, 1885, Thailand joined the Universal Postal Union, which coordinates the international postal system.
Prominent issues of Thai stamps are well presented all over the museum. The museum also preserves hundreds of old stamps and envelopes in frames filed in chronological order in metal cabinets accessable for every visitor. A huge library is inviting every collector and visitor to sit down and get lost in the world of Thai stamps and stamp collecting. Of course, a souvenir Shop is a must and some cute items are on offer, not only for stamp collectors. A well organized museum intersting for everybody! The staff is very friendly and proud to pass their knowledge on to every visitor with questions.