Bumper identification - smooth/no groove 33-36?

[ironandsteele]

Thanks for the replies.

I'm well-versed in the differences between 1933, 1934, 1935 and 1936 Ford bumpers and am familiar with their nuances. I'm specifically wondering about these bumpers with no line in them. They aren't custom, or aftermarket. The backs are pitted and there is no line on the backsides like shown above (nobody took regular bumpers and simply filled/smoothed them) or any other signs that would point to them being altered.

They appear to have been manufactured just as they are and seem to be original bumpers.

Any help would be appreciated.