The Boeing 747-200B is an improved version of the 747-200, with increased fuel capacity and more powerful engines; it first entered service in February 1971.
Thai Airways was the national domestic air carrier of Thailand. On April 1, 1988, Thai Airways merged to become Thai Airways International. Thai Airways International Public Company Limited is the national air carrier of Thailand, operating out of Suvarnabhumi Airport, and is a founding member of the Star Alliance network.
Boeing 747 Wikipedia Entry
Thai Airways International Wikipedia Entry