This is a cute accessory for Samantha - it's made of real wood and metal, and it has nice little details like a velvet edging around the eyepiece and piercing decorating the top.  The handle folds down to make it easier to store.  It comes with four vintage-looking cards, and those among us that are good photoshoppers could probably scan one in and create some new ones using other images.  The cards are a heavy cardboard and fit into a little wire frame at the end.  There is also a collector's card that tells about the stereoscope.

There's no easy way for the doll to hold it; we usually "help" Samantha out when we're playing.  It also looks very elegant laying on the parlor table.    I would give it an A - it would be A+, except it is a bit delicate and probably wouldn't hold up to a lot of rough play.

Some pictures below; I wasn't able to get good, clear pictures of the piercing on top of the metal eyepiece or the cards (yet).

Kim

Full view:

With handle folded:

With doll for reference (I had to help her a bit):