The wheels on my 1959 1/2 ton have these three tabs on the outside of the hub that are part of the wheel. I've been wondering if these are the original wheels? Photos that I've fond of other Apache / Task Force trucks do not have these three tabs. Is there any significance to the tabs?

https://swenracer.smugmug.com/Trucks/59-Apache/i-p2Wb4RL/A

Thanks in advance for any help on this.