Fat chance! You might guess a well-made, well-finished knife probably wasn't made of mild steel, but you can't tell one steel from another by looking at it. If they'll let you try sharpening it you could get a feeling of how hard a blade is in just a few strokes, but I don't suppose they'll let you, and I can't blame them; for all they know you might scratch the blade all to heck.
All I can suggest is to ask for a money-back guarantee.
-Cougar Allen :{)