It looks like there are sections of tubing welded onto the sides of the window frame. The extra rod looks like it slides down into these tubes. I don't think it is a bow for the top though. More likely it was a handhold as the three guys are using it for. Maybe the jeep was used by dignitaries standing in it for reviewing troops or somethjing like that. I have seen other jeeps with handholds on the window frame for this purpose.
ADM Nimitz's jeep w/handhold.
LTG Patton's jeep w/handhold.
Unidentified jeep w/handhold in jeep dump on Okinawa. (Wish those had come home.)
Gino P. Quintiliani - Field Artillery - The KING of BATTLE!!!
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