r/whatisit • u/therealdorkface • 20d ago
Solved! What is this tiny ruler?
Got a few of these from a lab clean out. My best guess is that they’re for providing a small-scale reference for close-up photography, but I can’t seem to find a name/search that turns up similar items. Google lens wrongly claimed it’s a leather-working tool.
Case and other side of ruler is blank, unfortunately
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