Found this several years ago while wandering the vendors at Camp Perry.
I have not found a single reference to it online, very cool, very, very well built machine. It is in almost new condition for being 40+? years old.
I have not used it yet. It takes square primer feed tubes. It took a little while to find the (almost) right size tubes.
The shell holder in the front is marked 30-06 H&H. Held on with 4 screws.