1621 German hand saw.
Fullsize image: https://s3-us-west-1.amazonaws.com/h...w_fullsize.jpg
https://s3-us-west-1.amazonaws.com/h...german_saw.jpg
Previously:
https://www.homemadetools.net/forum/...581#post174185
https://www.homemadetools.net/forum/...45#post1698252
https://www.homemadetools.net/forum/...932#post171598