| | | Knee joint. I'm guessing by classifying this as a cobalt-chrome alloy, but it's a reasonable guess.  I think this may be an older design, and may even be stainless steel: I need to test it.
 It's a very lovely piece of machinery, though you would click a bit walking with it.  What's really fun is the thoughtful labeling that identifies the front.  Otherwise you might end up with a knee that bends the wrong way, if your doctor got it backwards, which, I suppose, someone must have been worried about or they wouldn't have put the label on.
 Source: eBay seller smeezle
 Contributor: Theodore Gray
 Acquired: 20 December, 2003
 Text Updated: 11 March, 2007
 Price: $15
 Size: 9"
 Purity: <60%
 Sample Group: Body Parts+Medical
 | 
 |   | 
 |