Philatelic Museum พิพิธภัณฑ์ไปรษณีย์ The museum is on the 1st floor of the Metropolitan Postal Bureau behind Sam Sen Nai Post Office, Saphan Khwai area. It is open on Tuesday to Saturday from 9.00 a.m. to 4.00 p.m. Admission is free. Thai and foreign stamps of the past are on display. The collections of post books in both Thai and foreign languages are available at the library. Stamps and accessories for stamp collection are on sale.