I did not see a thread for this lens, so if the mods would move it I missed it...
I recently purchased a (slightly) used copy of the 01B to use as a sub-28mm lens on my M42 set up...
here is the 01B compared to the 01BB:
please note the change in the focus ring; the 01B's larger/more prominent focus ring is much easier to find/grip/use than the later 01BB's...
but it's the shots you're interested in:
near as I can tell in limited usage, the optics are the same as the newer version, but the coatings have definitely been upgraded in the newer version of this 24mm lens...