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Not much, one you hold over the bevel, the other rest on the bevel and is both 60 and 100x.

The 60x lighted loup can be bought for as low a $2 if you shop around. Buy a few as the replacement...

Pick up a 60x lighted loupe or a Micro Max 60x100 hand held scope both under $15 and look at the edge.

More than likely you have rolled the edge or micro chipped it stropping. It takes a while to...