Got it in a box lot of tools and parts from an old gunsmith. I am a CZ guy and I've not seen one of these before. Spent about 45 minutes searching online with no results. Anyone know what it is? When they made/sold/gave them away? Looks like some kind of combo screwdriver (rear sight adjustment, maybe - blade is small) and bushing wrench. But, the wrench part is small, too. the slot is only 3/4" long. Thanks!