Well, sort of... While "cleaning" yesterday, I found my other two sets. One is marked 1950-54 and the other 1950-59.
I suspect that both are for 1951-59 vehicles. These were aftermarket and include the bushings, support bearings and strange looking cork seals.
Both packages sport the same part number; KB 409.
BTW, I compared them to the earlier set that I mentioned here a few weeks ago and I just cannot see any difference (visually).
JT