About 11th Army and its wound badge see https://asiamedals.info/threads/wound-badge-of-11th-army.23369/
1st type.
Size 35x28 mm.
Obverse
長期奉公 - Long Service
reverse
第十一軍 - 11th Army
Original case.
長期奉公章 - Long Service Badge
Another cased specimen of 1st type.
11th army long service badge
imperial japan army badge
japanese 11th army badge
japanese army badge
japanese badge in the form of the shield
japanese military badge
第11軍長期奉公章
第十一軍長期奉公章
