Pseudo-Сommanding Officer's Badges (a.k.a. Embroidered Japanese Commanding Officer's Badge)

These emblems are often passed off as (or mistaken for) embroidered versions of the japanese commander's badge https://asiamedals.info/forums/commander-badges.621/

Actually these are army NCO officer school collar badges /陸軍士官學校襟章/ that were introduced on October 20, 1943.

Original regulation.

In wear.

 

Numerous variations are known.