Original: Thirteen nations made their first Olympic appearance in 1952: The Bahamas, China, Gold Coast (now Ghana), Guatemala, Hong Kong, Indonesia, Israel, Netherlands Antilles, Nigeria, Soviet Union (USSR), Thailand, and Vietnam.
Simplified: Twelve nations made their first Olympic appearance in 1952: The Bahamas, Gold Coast (now Ghana), Guatemala, Hong Kong, Indonesia, Israel, Netherlands Antilles, Nigeria, Saar, the Soviet Union (USSR), Thailand, and Vietnam.