Specimen from the collection of Raymond LaBar. Photos courtesy of the owner.
Obverse
防名 - Nagoya City Defense (most likely 名 for 名古屋市 - Nagoya City)
reverse
2597 = 1937
高須部隊 - Takasu Unit
1937 nagoya city airdefensecorpsbadge
2597年防名高須部隊章
airdefensecorpstakasuunitbadge
japanese airdefensebadge
japanese airdefense maneuvers badge
japanese badge