Thomson TTV-1531 Television Camera Colour Wheels

The TTV-1531 is a developed version of the TTV-1530 to meet the BBC requirements.
It was used in The Type 6 Outside Broadcast vans and elsewhere.

Above is a "Thomson" master control panel with the six colour wheels for black and white balance adjustments. These Colour Wheels were first used on the Philips LDK5 cameras in the type 5 OB vans.

The CameraMuseum library has a copy of the BBC 1988 camera evaluation report that lists the modifications/additions that were required.