Last night I received a phone call from The Amazing Scott Miller. He had found the solution to most of my puzzle of 2/17/17. After a lot of image searching he discovered the tool is a slide-hammer type of nail or staple puller. I only have part of the tool. Searching for Keen Kutter nail puller will lead to a number of images and there are similar tools made by other manufacturers.
Item 554 in this auction picture is one example.
That still leaves the swastika stamp undecided.