68th Signal Battalion, 1966-68 (Source: John Pratt, Cemetery 6, Nellingen) The equipment to the left of the Operator's Box or 'in-tray' on top of a KWM-2 are the KWT-6s. There were 2 KWT-6s to the right of the phone patch panel/tape recorder (on the extreme left in the photo that I sent) as well as 2 additional KWT-6s to the left of the phone/tape recorder equipment.