This is a French Ladies Razor. It is 2/8. I shaved with it once. They are rare and can go for major bucks.
My wife uses Arko in a dispenser and a Merkur Slant. She is very happy with both.
If you are buying your girl a straight, I would recommend a stainless steel model especially if she wants to shave in the tub. I don't think a normal high carbon straight will last long when exposed to bath water on a routine basis.
http://i1303.photobucket.com/albums/...psrxkmabwc.jpg