I was wrong. about 100x pic and here is a pic of a mm ruler I just took. So about 2mm.@Hazmat with the proportions, X50, image which 1mm side by side, this means that your your bevel is about 100µm wide....
The width of the bevel is about 1/10 of the width of the image.
Are you sure the image is 1mm side by side?
My apologies. I was off a bit.
But the OP's pics are much better quality and accurate than mine. No comparison. I was just showing what can be done at home with a pocketful less money. And I don't know how to do the math. I just eyeball it. LOL.