Mitutoyo can seam micrometer. For measuring width/height/depth of can seams.
Fullsize image: https://diqn32j8nouaz.cloudfront.net...r_fullsize.jpg
More: https://ecatalog.mitutoyo.com/Can-Se...147-C1126.aspx
Previously:
Giant micrometer tombstone - photo
Braille micrometer for blind machinists - photos
Calipers and micrometer Soviet Union flag - image
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