Clive,
I have 2 of the control boxes, both are the later toggle type. The one in the picture has mod 1 crossed off the dataplate. My detector does have a plug on the bottom, it obviously plugs in and then screws on to something. I need to find a Chieftain and go and have a climb on it! I have seen a photo of the boxes fitted inside a Chieftain turret, so I know the brackets I have are Chieftain too.
Thanks for the info,
Chris