Looks like part of the bays were hit with isolated polishing rounding the edge off a bit. When you remove some of the surface on the die, the coins will show a raised area on them. So it is not a bar, just a polishing die issue.
The bays are very close and probably all alttered at the same time. When looking under a scope slide in a toothpick. Then you'll have a better perspective of size of the devices on a coin.
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