1st variant of obverse.
2nd variant.
Reverse
航空教育集団- Air Training Command
ja.wikipedia.org
Another example.
Original case.
Additional column
海上自衛隊 - Maritime Self-Defense Force
Badges were manufactured by Nagawa workshop in Tokyo
asiamedals.info
2nd variant.
Reverse
航空教育集団- Air Training Command
航空教育集団 - Wikipedia
Another example.
Original case.
Additional column
海上自衛隊 - Maritime Self-Defense Force
Badges were manufactured by Nagawa workshop in Tokyo
Badges, watch fobs and plaquettes made by Nagawa Medal Works/名川徽章製作所
Founded in 1927 and still active today. Standard workshop labels.
asiamedals.info