Development Flight Distributor Unit similar to one that flew as the main payload on shuttle mission STS-1. Unit measures 16 x 8 x 16 and weighs approximately 46 pounds. One side has a metal United Technologies United Space Boosters manufacturer’s label which reads, “D. F. I. Distributor,” Ser. No. “112,” Mfd by “Teledyne Lewisburg,” with a manufacture date of March 1983. Input and output plugs are present on two sides, 10 with caps. In fine condition. RR Auction COA.