This has a fiberglass body.

https://willysforsale.com/ads/46-cj-2a-runs-and-drives/

“This Jeep starts, runs and drives. Fiberglass body tub and fenders. Windshield, hood and grill are OE. 12v conversion. Minimal frame rust and no apparent cracks. New fuel tank. Brand new full manual set. Hand brake doesn’t work. Needs tires and shocks. Oil seeping in several places from the drive train. When I purchased this Jeep, I was told the brakes and the clutch had been replaced. I have not verified that, but the brake lines have been replaced and the backing plates are solid. The clutch does not slip or chatter. The roll bar is only for appearance.”