I would request a picture of the other side of the blade as well as a close up of the mark. Solingen blades are pretty safe and if the other side looks like this side, then it is probably usable once honed. It is a lighter blade that will be less forgiving on the technique end, but should give you a very nice comfortable shave once you get a few shaves under your belt.

Good luck!

Let us know how you make out.

-Rob