The 64K Memory Module (By Atari)
 

        This 64K memory module was actually found by accident in a box of assorted memory cards.   Upon closer inspection it was noticed that the card had a CAO number printed on it.   This was a standard Atari parts numbering assignment header used on all its parts, so even though the word Atari or the Fuji symbol doesn't appear anywhere on this memory module, it is believed that this may very well have been an unreleased 64k memory module for the Atari 800 by Atari.