Every badge has unique number and sometimes even more unique case.
No. 1688
Obverse
努力學习, 力邪卫保 - Study Hard, Strengthen the National Defense
中國人民解放軍軍事學院 - Chinese People's Liberation Army Military Academy
reverse
軍學紀念章 - Military Academy Commemorative Badge
Stamped number 1688
Original case.
捷克斯洛伐克共和國 - Czechoslovak Republic
軍事代表团 - Military Delegation 留念 - Souvenir
紀念章 - Commemorative Badge
中國人民解放軍軍事学院旅增 - Respectfully Military Academy of the Chinese People's Liberation Army
1957.12.11. = December 11, 1957
No. 1688
Obverse
努力學习, 力邪卫保 - Study Hard, Strengthen the National Defense
中國人民解放軍軍事學院 - Chinese People's Liberation Army Military Academy
reverse
軍學紀念章 - Military Academy Commemorative Badge
Stamped number 1688
Original case.
捷克斯洛伐克共和國 - Czechoslovak Republic
軍事代表团 - Military Delegation 留念 - Souvenir
紀念章 - Commemorative Badge
中國人民解放軍軍事学院旅增 - Respectfully Military Academy of the Chinese People's Liberation Army
1957.12.11. = December 11, 1957