The 40/70 guns referred to in thread 21 were the 60's L7 automatic/upgraded 40mm Bofors that were joystick controlled and radar guided* for azimuth and height.
*archaic radar control it has to be said!

The guns subject to the original Q must be 3.7's less their wheel/transport platforms. It looked to me as though they had trails fitted - as per the old 5.5" heavy guns. but I can't get anything to come up with your prompt BAR.