These two “No Roads Needed For a ‘Jeep'” ads appeared during the late spring of 1953 in two different California newspapers. I don’t know if this was just a regional or a national campaign.
This first ad appeared in the April 29, 1953, issue of the Sacramento Bee, sponsored by the Winter Willys Company:
This second ad appeared in the May 12, 1953, issue of the Santa Cruz Sentinel, sponsored by Mosso & Puccinelli: