M151 MUTT.. they have an offset hub that puts the tire to the inside of the fender decreasing the track width of a Willys, not optimal on the jeep but will do as a spare in a pinch..
This is the spare wheel on my CJ3A, it is 16�. Any idea what it was on originally? Military? It has 6.00-16 net on it but it may or may not be an original tire, no idea. Just curious.