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郵政省郵便局章
Diameter 50 mm.
Weight 87 g.
Obverse
郵便創業百年記念 - 100th Anniversary of Postal Service Commemorative Medal
郵政省 1971 - Ministry of Posts and Telecommunications 1971
Marked 純銀 - pure silver.
Original case.
昭和三十二年 - 1957
一日郵便局長記念 - Superior Postmaster Commemorative
大阪中央郵便局 - Osaka Central Post Office
Inscribed inside
大阪中央郵便局 - Osaka Central Post Office
昭和三十二年四月二十二日 - April 22, 1957
Reverse
全国持定郵便局長会 - National Association of Post Office Directors https://ja.wikipedia.org/wiki/%E5%85%A8%E5%9B%BD%E9%83%B5%E4%BE%BF%E5%B1%80%E9%95%B7%E4%BC%9A
Marked Sterling.
Badges have three grades
甲種 - A (silver-colored badge)
乙種 - B (bronze-colored badge)
丙種 - C (bronze-colored badge)
In turn every grade has four classes.
一級 - 1st class
二級 - 2nd class
三級 - 3rd class
四級 - 4th class
Grade A badges.
2nd class.
Reverse
逓信省 - Ministry of...