Pule Rate Converter made by Bell Aerosystems for the Jet Propulsion Laboratory, measuring 4.25″ x 7″ x 4″, with a black parts tap on the top of the mirrored metal housing: "Pulse Rate Converter, Part No. 6042-302020-1, Mfd by Bell Aerosystems Co, A Division of Bell Aerospace Corp for Jet Propulsion Lab, Serial No. 2." In fine condition.
