Flag of the Royal Prussian 27th Jäger Battalion
Suomen puolustusvoimien joukko-osastoperinteet: Puolustusvoimat 90 vuotta 1918-2008 (in Finnish) (pdf) page 34. Finnish Defence Forces, National Defence University, Military Museum (2008).
Finnish Defence Forces

original design by Maximilian Bayer, Erik Jernström (Finnish) and Fritz Wetterhoff (Finnish)
vectorized in 2021 by user: Fenn-O-maniC