1st type "White band".
Reverse
民法大[学] - Civil Law University (when read from right to left 大法民 /Taihō Min/ - Basic Law (The Great Dharma; Great Law of Mahāyāna Salvation).
Another scenario: 民法大 is an unknown abbreviation.
Stamped with No. 7.
Marked 純銀 - pure silver.
Reverse
皇紀 - Imperial year
二千五百九十四年 = 2594 = 1934
三月 - March (Empire of Great Manchuria was proclaimed on 1 March 1934 and Puyi became Kangde Emperor).
滿洲帝國政記念 - Manchurian Empire Government Commemorative
騎兵集團 - Cavalry Group
Marked
純 - pure (obviously for 銀純 - pure silver).