I see you had it carried to the house so does it run or did it come from too far of a distance and you didn't want to take a chance? If you take the diff covers off you still may not be able to tell what brand of locker it is, but you'll be able to tell if it is a lunchbox type locker, welded, spooled or Detroit. Because CJs have lockouts I've seen a lot of guys weld the spiders rather than actually using a locker for cost savings in the front.
Are you going to take it up to the Mounds or Bundy for its first off road excursion? I figured those are the two closest places to you.
Roger