Two variations of Eduard-made badges are known: "large" and "small" badges. They differ from each other not only in size but also in stamps. The seasiest wat to diffientiate between two variations - geometry of the ribbons.
"Large" variation vs. "small" variation.
Large badge.
History of...
airforcebadge
imperial russia airforcebadge
imperial russian air fleet silver badge
знак комитета усиления воздушного флота
нагрудные знаки императорской россии
нагрудный знак императорской россии
особый комитет по усилению военно-воздушного флота
серебряный знак комитета усиления воздушного флота
Reverse
航空集団 - Air Force
Miniature.
Original case.
Golden Kite order ribbon.
Made by Nagawa workshop https://asiamedals.info/threads/badges-watch-fobs-and-plaquettes-made-by-nagawa-medal-works.23299/