Mamiya 120 back - pro vs pro II

I'm looking to purchase second 120 back for my RZ67proII. I noticed that on *bay some of the backs are marked as PRO II as opposed to PRO. They also dictate slightly higher price. Is there any difference between two? Will older 120 PRO work properly on rz67 Pro II?

Thank you

ig

yes both will work. i have a proii back and a pro back on my rz67ii

The ProII's have an additional frame counter so you can see it easier when shooting verticals.
I believe the ProII's also don't have seals that can wear out but don't quote me on this aspect as I'm not 100% sure.

I just went with the ProII versions.

I have one pro and one pro ii back for my rz67 and they both work essentially the same as others have already mentioned. The biggest difference is that a pro ii back is most likely newer, so that may be one reason for the higher price. IMHO the pro ii back by itself has no essential feature for which I'd pay more, but its younger age may make it less prone to plastic brittleness or other problems which come from material aging.