This is a rather hard to find original American Bosch ZR4 2-cylinder magneto for an old tractor, car, truck, or other engine.  I believe this would be correct for some Eagle tractors, Waterloo Boy, and some others.  It is a ZR4 magneto that has been converted to 180 degree firing with the correct cap so as to be set up like a  ZR4/2 or DU4/2.  It is in good used condition with no cracks, breaks, or repairs that I can see or know of other than a couple slight cracks in one cover and some slight damage by the top oil cap which really don't affect it's performance.  It is clockwise rotation as noted on an oiler cover.  It mounts on a 2 inch square hole pattern and the mounting threads are in great shape.  It has no noticeable bearing wear and turns over very nicely with good magnetic pull and the impulse seems to work as it should.  It puts out a hot, snapping spark that is sure to run your engine if it is set up properly.  It has the original points cover as can be seen and everything in the points housing looks to be in great shape. This magneto should be ready to go to work on a tractor or it could be put on your shelf for a future project.  The pictures tell the story.  You'll like it!  I can be reached at 262 573 193 1 if you'd like to talk about it.  Good Luck.