One ounce bullion bar. 
I purchased this bar for spurious reasons in the early 1990s from a coin dealer near Berkeley, California.  I think I paid about $500 for it, and now it's worth about $550, but in the meantime it's been worth more than double that, because of the price spike caused by catalytic converters in cars.  I never noticed between then and now how much the price had gone up and back down. 
In April 2002 I had Brian Knox jewelers in Champaign, Illinois weld a 90%Pt/10%Ir alloy loop onto the back of it, so it could be locked down to the table with a length of stainless steel cable. 
Source: Coin Shop in California 
Contributor: Theodore Gray 
Acquired: 15 April, 2002 
Price: $600/including loop 
Size: 1.5" 
Purity: 99.95%
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