..regarding the engraving..Look at this one:

http://www.jagd-waffe.com/CS/bild.php?show=waffen083.jpg
http://www.jagd-waffe.com/CS/bild.php?show=waffen084.jpg

I have seen the pictures of the barrels of this Manton..The chambers are very pitted.
The seller wants Eu$ 4900,00. Personally I wouldn`t not buy such a gun...regardless of price.
It`s a "beginners gun"...

It also looks like someone has tried to "create" a "flameblue" coloring on the frame.