doesn't explain the product variation tho.
They are both F-PRO btw, infact their boxes read the same too
Having owned multiple B+W MRC UV Haze filters, I have never seen one with "72 010 UV Haze" marked on the outer rim.
I found this on MaxSaver's site:
While maintaining the excellent quality of materials, fabrication, and high mechanical stability, the new F-Pro mount has become thinner, so that now it can also be used on many wide-angle lenses without the danger of vignetting. Another advantage of the new F-Pro filter mount is its modified retaining ring, which is no longer threaded in from the front, but holds the filter glass in place from the back. This prevents the retaining ring from being accidentally loosened during the removal of an additional filter or a lens hood that has been screwed in too tightly.
Can anyone find anything to back this statement?