I stand to be corrected but, I don't believe that '41 Fords had these fitted from factory. They may have been available as an aftermarket accessory from other vendors, perhaps not by Ford though?
as far as I know they were not '41 items. I assume they were added later or rear fenders were changed to later yrs but bottoms of the fenders, where they meet the running boards, would not match
Thank you everyone for the info.
The P/O had installed a set of cheap looking chrome ones on the rear fenders. I want to at least swap them with black rubber ones. He had drilled holes to mount the chrome ones. In the process of taking off all the aftermarket add On's etc.