I've got an old Buehler that may qualify. It came off a 1948 FN commercial action that was probably drilled and tapped to fit the mount instead of vice versa. A Bueler I picked up on Gunbroker has a different pattern.
Since there's only one hole in the bridge and the hole is misplaced for other bridge mount, I'm going to have one hole drilled that will allow two-piece mounts to be used. Right now, it wears a 2moa Vortex red dot mounted on the receiver ring that allows suprisingly precise shooting when the correct target is used.
