I recently noticed a Touch a Matic set on eBay that apparently has a built in battery (not the plug in kind with a modular connector). I've never seen one of these sets before or found any reference in a BSP. Anyone have any information on these? Seems they are very rare.

Search eBay for item number: 166243419953 or search for Western Electric 2872 touch a matic 32 6 Button 1A2 Key Phone.

Thanks, Jim