My 160-year-old Copenhagen Windows (1864-2024) (Dannebrog windows) Replaced .. DIY

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THIS house, and the neighboring houses (called "the Milky Way" (Mælkevejen) Christiania)) was built 1864-65.
I don't know if the Germans during World War 2, may have replaced or just maintained the windows. But the window FRAMES look like is from 1864-65.
"Nova-Huset, Mælkevejen, Christiania, Danmark".