Antique compression tester.
https://s3-us-west-1.amazonaws.com/h...r_fullsize.jpg
5:13 video:
https://www.youtube.com/watch?v=GEFOjxhEra8
Previously:
https://www.homemadetools.net/forum/...291#post188534
https://www.homemadetools.net/forum/...739#post186458
https://www.homemadetools.net/forum/...050#post184165
https://www.homemadetools.net/forum/...924#post175645
https://www.homemadetools.net/forum/...806#post137018
