State flag of Poland with Coat of Arms. Used also as the merchant ensign since 1919 to 1927.
Dz.U. 1919 nr 69 poz. 416
Flag of Poland (with coat of arms).svg
Herb Polski z lat 1919-1927 vector.svg
Flag of Poland (with coat of arms).svg: Aotearoa
Herb Polski z lat 1919-1927 vector.svg: Ziegenpl
derivative work: Mboro (talk)