It’s listed asa. M-606, but I don’t see anything to indicate it is anything other than a CJ-3B. Notice that just behind the bumper it appears there are a couple of support bars that appear non stock.
https://rochester.craigslist.org/cto/d/willys-jeep-1953-navy-m606/6621778187.html
“1953 Navy Willys Jeep. Restoration 95% complete, over 20K invested. Just add Navy markings of your choice.”