Quote Originally Posted by Shaggy
It's larger than the Yashica by about 4-5mm(eyeballing). The only markings are the logo & Germany on top & bottom of the hood respectively.
It would make life way too easy if they put a size on it.
Mine had a R-III on it. (Fancy Rollei R!)

Sounds like maybe a II rather than III. I think there is a place somewhere out there where they have specs on these things, but I have lost track of it since I haven't sold any Rollei stuff in a while. If I figure it out I will let you know.

Does someone out there have any hoods or filters for their Bay II or Bay II Rollei that they could measure?