Japanese WWII Nomonhan Incident Medal Cased

Original era manufacture. Medal which commemorates the battles between the Imperial Japanese Army and Red Army in Manchuria in 1939. The battles resulted in a decisive defeat for Imperial Japan and marked the rising star of the Red Army commander Georgy Zhukov. Very clean example of the medal, however its original issue box seems to have attracted the attention of paper eating insects as the thin red covering of the box has been pretty much consumed. The small metal hook on the reverse of the ribbon is missing.