Photo courtesy of the owner.
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蒙地奉上紀念 - Mongolia Gift Commemorative /奉上 - to present (something) respectfully; to offer/
科爾沁左翼中旗公署 - Horqin Left-wing Middle Banner Government Office
Horqin Left Middle Banner /Mongolian script: ᠬᠣᠷᠴᠢᠨ ᠵᠡᠭᠦᠨ ᠭᠠᠷᠤᠨ ᠳᠤᠮᠳᠠᠳᠤ ᠬᠣᠰᠢᠭᠤ; Chinese: 科尔沁左翼中旗/ formerly known as Darhan hoshuu, is a banner of eastern Inner Mongolia, People's Republic of China, bordering Jilin province to the east. It is under the administration of Tongliao City, 101 kilometres (63 mi) to the southwest. The local Mongolian dialect is Khorchin Mongolian.
康德五年十二月 - Kangde Era 5th year 12th month = December 1937
Reverse
蒙地奉上紀念 - Mongolia Gift Commemorative /奉上 - to present (something) respectfully; to offer/
科爾沁左翼中旗公署 - Horqin Left-wing Middle Banner Government Office
Horqin Left Middle Banner /Mongolian script: ᠬᠣᠷᠴᠢᠨ ᠵᠡᠭᠦᠨ ᠭᠠᠷᠤᠨ ᠳᠤᠮᠳᠠᠳᠤ ᠬᠣᠰᠢᠭᠤ; Chinese: 科尔沁左翼中旗/ formerly known as Darhan hoshuu, is a banner of eastern Inner Mongolia, People's Republic of China, bordering Jilin province to the east. It is under the administration of Tongliao City, 101 kilometres (63 mi) to the southwest. The local Mongolian dialect is Khorchin Mongolian.
康德五年十二月 - Kangde Era 5th year 12th month = December 1937