I can't even read the scratches that are written in English. Glad you got it open. I'm sure many here may disagree but case backs can bee an issue for the small knife like openers. Many years ago I bough a wood workers chisel and started using it for these cases. They are very sharp, made of hardened steel and give a great grip while using. I have never damaged a case with my chisel.
I think the scratches are all Russian.
If you ever have access to a sharp chisel and an old snap-back watch give it a try. Thee knife like openers like you pictured simply leaves marks when I use them, but happy it works for you.
I've never used a chisel but agree that the standard case opening knife is often too blunt to effectively enter the gap and so there's a chance of marring and still not getting the back open. I have intended to sharpen a standard case opening knife to see if it helps with a thinner edge but have never got round to it. It really annoys me when I see beautiful movements scuffed by clumsy efforts to open the case and that's on top of case damage.
Well, they say clean cuts heal quicker . . .
Well, it was made by a razor maker in Marseilles, so it could be!
