Logging California redwood in the 1940s. In the early days, the lumberjacks who felled these giants only used axes and saws. But shown at 3:09 and 4:25 are early versions of powered reciprocating saws.
https://www.youtube.com/watch?v=5f_FjfIQQfo
Previously:
https://www.homemadetools.net/forum/...626#post118076
https://www.homemadetools.net/forum/...3411#post99026
https://www.homemadetools.net/forum/...0797#post73160
https://www.homemadetools.net/forum/...482#post127814