1790 semi circumferenter.
Fullsize image: https://diqn32j8nouaz.cloudfront.net...1_fullsize.jpg
https://diqn32j8nouaz.cloudfront.net...mferenter1.jpg
Fullsize image: https://diqn32j8nouaz.cloudfront.net...2_fullsize.jpg
https://diqn32j8nouaz.cloudfront.net...mferenter2.jpg
More: https://en.wikipedia.org/wiki/Circumferentor
Previously:
https://www.homemadetools.net/forum/...355#post173272
https://www.homemadetools.net/forum/...109#post172311
https://www.homemadetools.net/forum/...207#post157829
