UPDATE: I mistakenly listed this as a 1954 ad. It am told it was actually a 1956 ad.
Andy spotted and bought this 1956 CJ-5 ad on eBay. The jeep has an odd look about it. I think it’s the 1) skinny fenders, 2) thinner than normal hood and 3) odd grille. It makes it feel a little bit like some kind of CJ-4 (though the actual CJ-4 has flattish fenders). The headlights on the grille in the ad look more like 7″ headlights on an MB grille.
For comparison, a 1955 CJ-5: