I have 3 carb mixture rods. Im not sure which ones are original. I am thinking 2 are, and the one with the flattened end my be a repro. The longest one is 18 3/4" The ruler is 18 inches long. All rods have a thicker diameter shaft than the U shaped end.
The one marked C has almost a forged end to it as it has a seam on the sides at the bottom, has the drilled hole, and one leg is a tad smaller than the other in diameter, maybe wear?
All the brass knobs are original and the dash plates. I had those separate before I got the rods.
Oldest to newest would be C A B. I think A is probably right for 1913. I think C is probably 1910 or thereabouts. 1909 was long like that but had two cotter pins.
I had a hunch that C might of been early, but not that early.
I'll mark A for my 13 project.