The Bridgeport Gun Implement Company made those. The ramming/seating device had five plungers on a handle designed to be used with both hands. The block should be marked with a stamp showing 'B.G.I' with a number beneath it.
I took it out in the bright sunlight and looked it over closely but didn't find a B.G.I. stamp anywhere.
The crimp roller is marked B.G.I. I've had it and other old loading tools a long time.
I did a Google search for a B.G.I. box (and other combinations) but didn't come up with anything looking like this.
