pre-WW2 Rare Polish Shoulder Badges – Officer School/Greater Poland Infantry Officer Cadet School

Rare shoulder badges from the Officer School/Greater Poland Infantry Officer Cadet School in Poznań/Bydgoszcz. The badge was approved by the order of September 6, 1919, and worn by all cadets of the Officer School.
The badges have originally preserved mounting prongs on the reverse. More information about the school and its uniforms can be found in the publication: “Greater Poland Infantry Officer Cadet School (Historical Sketch)” [https://www.wbc.poznan.pl/dlibra/publication/320539].
A comparable example is published in the book “Poznańczycy w Wojnie Polsko-Bolszewickiej 1919-1921” by Bartosz Kruszyński on page 64 from the collections of the Museum of Polish Arms in Kołobrzeg.