I have two different floorboards that appear to be original, but the brake lever trim is different on each. One has no folded over tabs to hold it in place and has four as best I remember holes that nails are driven through and bent over on the backside. The other has no holes, but has the tabs that bend over inside the brake lever slot, to hold it in place. Which is original; or are both? the MTFCA Encyclopedia, doesn't address the subject.
I would contact John Regan.
He makes authentic reproductions of the flat floorboard trim based on factory drawings, etc.
He may have also researched later floorboard trim such as yours and may be able to provide an answer for you.
One important thing you failed to mention. What is the YEAR of the car you are talking about. Both are correct for certain years. The tab types were used later. I'm not sure when the change was made, but the archives would have a record of that.
Larry, the fordor is a 26 and the coupe is a 27. Since I only have one of each type trim, and since Lang's catalog indicated the 26-27 trim is being reproduced; I'll use the original on the coupe and the repro on the fordor (driver). Lang's catalog picture does not show tabs on the 26-27 trim, but does show holes drilled in it.