I agree, No.3 three appears to be a Bokum internal threading bar. A picture of the cutting edge in profile would confirm that.
The boxes of Komet carbide inserts are for Komet insert drills. I've never seen those with the high positive chipbreaker (top form geometry) before, but depending upon greade they could well be made for drilling aluminium.
The tools in the last photos of your first posting of photos is a beautiful set of counterbores with interchangeable pilots. They are primarily used to counterbore drilled holes to accept and sink the heads of socket head cap screws, though there are other uses.
The boxes of Komet carbide inserts are for Komet insert drills. I've never seen those with the high positive chipbreaker (top form geometry) before, but depending upon greade they could well be made for drilling aluminium.
The tools in the last photos of your first posting of photos is a beautiful set of counterbores with interchangeable pilots. They are primarily used to counterbore drilled holes to accept and sink the heads of socket head cap screws, though there are other uses.