The Canon 7s and 7sz had a mount close to center (not in the middle, and still a bit off to one side). All the others are on the end (including the Canon 7... it had a selenium meter and no battery, while the 7s and 7sz had to make room for a battery compartment in the base, so they shifted the tripod mount to the other side of the camera by the back unlocking key).
Could it be for a Canonet or for an SLR? I know those have the holes pretty much in the middle (at least under the lens).
Linear Mode
