It's a student biological scope marketed by Amscope. It's made in China but the build quality and optics are quite good. http://store.amscope.com/m200-ms.html
Also ordered 2 other eyepieces at 5x and 20x to increase the magnification options.
The light has to be altered to position the sources on either side so it reflects upwards off the stylus. The stage had to be replaced with something thinner to use the 40x objective lens. This is not absolutely necessary as 200x (10 x 20) is adequate to view the wear patterns.
More details can be found in Sparky's thread at AK.
The CCD camera head is also very well made, but lacks the pixel resolution and fine colour definition that optical viewing brings. It is useful only for posting images on the web. There are much better ones available but it seems pointless to me to spend more on the head than the scope itself. Note that this is still substantially better than the standalone usb scopes being discussed here.http://store.amscope.com/mu035.html
Note that the magnifications mentioned above are only estimated. The camera head comes with a 0.5x reduction lens, but I find it difficult to quantify it's meaning against what I see with the optical eyepieces.