Boring apparatus on HMS Porpoise (Tuvalu 1977)

01 January (Tuvalu ) within release Royal society expeditions goes into circulation Stamp Boring apparatus on HMS Porpoise face value 20 Tuvaluan cent

Stamp Boring apparatus on HMS Porpoise in catalogues
Michel:	Mi:TV 55
Stamp Number:	Sn:TV 55
Yvert et Tellier:	Yt:TV 56

Stamp is vertical format.

Also in the issue Royal society expeditions:

• Stamp - Hurricane beach and coral from photograph by expedition face value 5;
• Stamp - Boring apparatus on HMS Porpoise face value 20;
• Stamp - Dredgings made to prove Darwin's theory face value 30;
• Stamp - Charles Darwinand HMS Beagle on world voyage 1831-1836 face value 35;