Seal of King Christopher "of Bavaria", king of Denmark, Norway and Sweden.
Illustration by Professor Julius Magnus Petersen (4 Sep 1827 – 1 Feb 1917).
Illustration by Professor Julius Magnus Petersen (4 Sep 1827 – 1 Feb 1917). Image from Henry Petersen: <i>Et dansk Flag fra Unionstiden i Maria-Kirken i Lübeck</i>, Copenhagen: C. A. Reitzel, 1882, page 10. Own scan.