I suspect you may be a little early on that Duracrest ad; don't think thinwall (aka foam insulation) came out until the mid '60s. Friends had the refrigerator in their basement (in St. Louis, which makes sense as May Department Stores was HQ there). Believe it was manufactured by Kelvinator, as the refrigerator had a cold-plate and the freezer was hidden frost/fan design (with the fan turning off when you opened the freezer).