Thailand. (Siam Steam Navigation Company - Postmarks). Circa 1908. SG 98, 4a pale scarlet (vertical pair) cancelled by oval 'S.S. "Mahidol" (753 tones) in black with hand-stamp script 'S.S. "Mahidol" in violet and additional Nakhon Si Thammarat date stamp.
The 'S.S. "Mahidol" was built in 1908 for the 'Siam Steam Navigation Company'. The Company was formed as the 'Danish East Asiatic Company' in 1897. The Company had a steamer calling port to port from Bangkok down the Malay Peninsular with passengers, goods and had a contract to carry the mail. More vessels were added until the 'Siam Steam Navigation Co.' was founded in 1909. The steamers would carry mail from port to port in the mail bag. Loose letters were cancelled by the Purser's fancy rubber hand-stamp and mail cancelled on board ship are very rare indeed.
A scarce item with two different 'Siam Steamship' cancels.
The S.S. "Mahidol" was wrecked on the Kemaman Bar 30th October 1936.'