Wrong country-insignia
Not Finnish-Swatiska in the 1918-early 1920s era ?
There is nothing wrong in it. Blue swastika was our airforce insignia from 6.3.1918 to the end of WW2. Originally it was a "lucky sign" of count Eric von Rosen who donated the first airplane (Morane-Saulnier Parasol / Morane-Saulnier Type L or licence by Swedes Thulin Typ D).