Surely just because something is harder than another does not mean it can't be scratched.?
Stone is harder than shoe leather and yet you'll still see steps in old buildings with depressions where people have walked.
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18k GMTIIc, II,16013 DJ, PAM 112, Patek ref 96J, Helson Bronze, Elgin Trench,
Gruen Curvex, Omega F300 and a few others......
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