These Sears-branded Selectro hubs have the smaller ribbed style.
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“Aftermarket Sears Manual Locking Hubs Taken Off Willys MB Fits CJ2A GPW Jeep CJ. Condition is “Used”. Used take offs for rebuild or parts. D-bubba-ing my 1945 MB and finally got around to removing these off the front axles. As is condition. The Jeep has not run since I acquired it and therefor these are untested in driving conditions. Mounting bolts are not included.”