The surface cools (Niuafo'ou 1989)

17 November (Niuafo'ou ) within release Development of the earth goes into circulation Stamp The surface cools face value 32 Tongan seniti

Stamp The surface cools in catalogues
Michel:	Mi: TO-NI 157

Stamp is square format.

with UPU emblem

Also in the issue Development of the earth:

• Stamp - Volcanic formations face value 32;
• Stamp - Jurassic face value 57;
• Stamp - The space age face value 57;
• Stamp - The mountains face value 42;
• Stamp - The seas face value 32;
• Stamp - The surface cools face value 32;
• Stamp - Carboniferous face value 57;
• Souvenir Sheet - World Stamp Expo & XX UPU Congress, Washington DC, 1999 face value 5.25;
• Stamp - The Earth's crust face value 32;
• Stamp - Jurassic face value 57;
• Stamp - The space age face value 57;
• Stamp - The Earth's surface face value 32;
• Stamp - Pleistocene face value 57;
• Stamp - Cambrian face value 42;