Complex sentence: Essentially, in regards to the original 1880 image, its not PD because its released with "No known copyright restrictions", its PD only because its a pre- 1955 image, and its on wikipedia/media, because it is also PD in the US.
Split into simpler sentences: Essentially, in regards to the original 1880 image, its not PD because its released with "No known copyright restrictions", its PD only because its a pre- 1955 image. Its on wikipedia/media, because it is also PD in the US.