Link type 182 Operation Control Panel for use with the LDK5.
These were adapted by Link Electronics for use in the BBC Type 5 outside broadcast vehicles in conjunction with the LDK5 cameras. They are derived from the standard Link Electronics OCP.
The "open & close" pots set the range of the iris control and the small button marked "Free" disabled the controls so they could be re-positioned to give more or a different range of operation. This was possible because only changes were sent to the camera, not the absolute control position.