This photo is undated, so it’s unclear whether this is an original from the time period or a reprint. Still, it’s got some good details in it. The front fender suggests this may have been a CJ-4MA.
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“Estate sale find of a vintage photograph of what appears to be a 1954 or 1955 M170 Frontline Ambulance Jeep being used in a medical emergency exercise, with several “patients” on stretchers inside the vehicle and one helmeted stretcher-bearer carrying one. Original period photo, not a modern copy or reproduction. Approximately 10 inches wide, 8 1/8″ tall. “Plate#79″ handwritten on the back.”