Hewlett Packard 10231C Six Bit Data Probe for HP's 1600 series of logic state analyzers. This probe has been fully tested on a 1607A and works perfectly, but it does not include the plug-in test leads (12" leads with a standard IC test clip). Apparently, this probe was once owned by 'Ace Lab', as it has been scratched into the aluminum faceplate...but hey, it's cheap and it works. Probe includes original operation notes, as shown in photo.
