This is an original Webster JZ low tension magneto for a hit and miss or throttle governed gas engine. The JZ was used on the vertical IHC Famous (with a correct trip finger) and 4hp horizontal Famous/Titan engines. It was also used on several other engines. It is in great shape with no cracks, breaks, or repairs that I can see or know of other than some rust pitting on top of the magnets and deterioration on the name band which are strictly cosmetic. It has newer springs on it and almost no noticeable wear in the bearings or on the trip finger. It mounts on a 2 3/16 x 2 13/16 inch hole pattern. The magnets have just been recharged and this magneto puts out a very hot spark that is ready to run an engine if set up properly. If you need a brass JZ magneto for any reason here is a pretty nice one. The pictures tell the story. It would also make a great spare on the shelf.