Image 22/30 1/4-ton truck (Willys MB jeep) and 2 1/2-ton 6x6 truck (CCKW) with wire and equipment for a four mile standardized military circuit. The range of field wire circuits using sound powered telephones, it is 4 miles (6.4km). Showing wire W-110-B (on reels) and reel unit RL-26-(), in the truck. Wire WD-1()/TT in eight dispensers MX-306()/G in jeep. Prepared by Signal Corps Engineering Laboratories, 28 August 1946. Note Willys embossed on rear panel of the jeep.