Large receiver loop filter affiliated with an unknown Jet Propulsion Laboratory satellite or space probe (possibly Mariner), measuring 16.75″ x 13.25″ x 4″, with a JPL label on the side: "Model No. MM69, Reference No. 2102RX2A5, IPL Number 10004567-1, Serial No. 003, Title: Receiver Loop Filter." The unit has input/output ports on two sides, as well as two serial ports with severed wires. In very good to fine condition, with overall tarnishing to the finish.
From The Peter Gerry Collection.