Neither the hood nor the tailgate have a Willys script, so the tub seems to be newer than 1960. The top appears to be for a CJ-5. Not that the steps have been modified and the drain hole removed.
https://fortmyers.craigslist.org/lee/pts/d/north-fort-myers-willys-jeep-cj3b-1960/7012632492.html
“1960 Willys Jeep CJ3B
Runs and Drives
Has overhead Valve original engine and running gear
Needs Master Cylinder
Jeep is complete
Has aftermarket Cab (maybe Sears)”