This keychain was available at The Company Store at Apple. The design is a teardrop-shaped polished silver fob with an etched Apple logo and a silver key ring. The keychain sold for $8.95.
This is one of several unique Apple-logo products that was available at “The Company Store @ Apple” located in the Infinite Loop Campus (in the 1 Infinite Loop building). When Apple began moving to the Main (“spaceship”) Campus at Apple Park, a Visitor Center was built near the new campus and The Company Store was closed and replaced by more standard Apple Store.
I have four of these in my collection, one unpackaged and three in original boxes.