Many years ago I had a number of Graphic and view cameras and a Mamiya RB67 all of which I sold long ago. Recently I found this matched set of clamshell-style cut film holders. I thought they were for the RB67 but they don't fit. I'd like to identify what cameras these would fit. I would greatly appreciate any help given.
Images:
1 2017 12 31 23 31 58
2 2017 12 31 23 32 58
3 2017 12 31 23 32 40
4 2017 12 31 23 33 20
5 2017 12 31 23 34 52
6 2017 12 31 23 36 31
7 2018 01 01 00 05 11