How was this coin cleaned?

[Ghengis_Jon]

Obviously by some mechanical means.  Looks like it was anchored somehow and then make to kiss an industrial grade belt sander.  Just curious of some of the techniques used by low end coin butchers.

[SC]

Those are relatively deep gouges into a hard brass-like alloy.  I think it would take a metal file or steel wire brush and not just sandpaper, even from a belt sander. [Besides belt-sanders are for belt-sander racing and not coin cleaning.]

I have some coins with an even worse cleaning.  The relief is all flattened bright copper while fields are still covered in dark green encrustations.  In a few cases I have wondered if they were done on a grinding wheel!!!

But to be safe have you looked under magnification?  I also have some coins with similar marks where the marks are clearly ancient - i.e. partially under encrustations/corrosion.

Shawn

[areich]

These coins just look that way, because of the way the flans were prepared for striking. Look up some well-preserved examples on acsearch.info to compare.