Birds of Japan

A cover from Japan 🇯🇵 with a block of 4 stamps and an interesting Postal meter stamp label.

According to the International Postal Meter Stamp Catalog on wikibooks, this is #PO15 from the Matsushita Electric Company.

Vertical design with three bars over characters for Japanese Postage and "NIPPON" above boxed postage rate ( 30 yen in this case ) , town name (Kanazawa Daigaku byouin - Japanese above English), a water bird (Mandarin Duck) with wings spread over water, the characters "通用当日限り" ("Valid on issued date only"), year of the Emperor between five-pointed stars, and the date (DD.MM.YY) at bottom. Frame lines are at the sides of the frank above the dates and below the three bars. Printed on white and salmon-coloured papers.
This particular label on white, glossy paper, was posted in Kanazawa Daigaku byouin ( Kanazawa University Hospital ) , a national university of Japan in the city of Kanazawa, the capital of Ishikawa Prefecture on March 22, 2019 (in the 31st year of the reign of the 125th Emperor Akihito).

10thAnniversary of the International Antarctica Treaty

Year of issue : 1971

The Antarctic Treaty and related agreements, collectively known as the Antarctic Treaty System (ATS), regulate international relationswith respect to Antarctica, Earth's only continent without a native human population. For the purposes of the treaty system, Antarctica is defined as all of the land and ice shelves south of 60°S latitude. The treaty entered into force in 1961 and currently has 53 parties. The treaty sets aside Antarctica as a scientific preserve, establishes freedom of scientific investigation, and bans military activity on the continent. The treaty was the first arms control agreement established during the Cold War. Since September 2004, the Antarctic Treaty Secretariat headquarters has been located in Buenos Aires, Argentina.

Flag of the Antarctica Treaty

The treaty was a diplomatic expression of the operational and scientific co-operation that had been achieved "on the ice".

Thanks Dinh Duong Tung Anh for this beautiful cover :) 

Reference : https://en.m.wikibooks.org/wiki/International_Postage_Meter_Stamp_Catalog/Japan