Section of Tonga trench (Tonga 1985)

10 April (Tonga ) within release Geological Sutrvey at the Tonga Trench goes into circulation Stamp Section of Tonga trench face value 29 Tongan seniti

Stamp Section of Tonga trench in catalogues
Stamp Number:	Sn: TO 597
Stanley Gibbons:	Sg: TO 900

Stamp is square format.

Also in the issue Geological Sutrvey at the Tonga Trench:

• Souvenir Sheet - Bearded angler face value 1.50;
• Souvenir Sheet - Bearded angler face value 1.50;
• Stamp - Diagram of aerial oil survey face value 47;
• Stamp - Diagram of Marine seismic survey face value 32;
• Stamp - Diagram of sea bed survey face value 1.50;
• Stamp - Section of Tonga trench face value 29;