Kwantung Army Merit Badge for Construction of Andong Airfield in Korea

Beautifully enamelled badge.

安東 - Andong (town in Korea)

안동시 - 위키백과, 우리 모두의 백과사전

ko.wikipedia.org

飛行場 - Airfield

建設 - construction

功労賞 - merit award

Reverse.

関東軍 - Kwantung Army

純銀 - pure silver

Original case.

Badge was made by Hattori workshop

History, Labels и Marks of Hattori Watch Shop, Tokyo/服部時計店

The company was founded in 1881 when Hattori Kintaro opened a watch and jewelry store called Hattori Tokeiten/服部時計店 in Tokyo's Ginza district. 11 years later, in 1892, he began to produce a watch called Seikosha (精工舎 / Seikōsha), which can be translated as "the house of exclusive craftsmanship"...

asiamedals.info

Approximate size.