You can see the power cord for the chain saw coming over the shoulder of the guy in the white fire coat. This image was from a public relations photo op to highlight the benefits of the CJ-3A for forestry and brush fire purposes. The shot was taken in 1949 and was included in a press release from Willys-Overland Motors.
The caption read: With the forest fires now completely under control, the forester with walkie-talkie on right reports on mopping up operations while a Jeep-powered chain saw is used to cut a burning log. The Jeep will drag unburned logs across a fire lane as water crews extinguish the lat spark in the burned-out area.
