This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Polhem Svenska Akademiens medalj. en Swedish Academy's medal in honour of Christopher Polhem as depicted in its Transactions volume sv Svenska Akademiens medalj ver Christopher Polhem Scanned by google id TfozAAAAMAAJ pg PA Google author medal engraver print engraver possibly Martin signature lower right PDold Christopher Polhem