Model One: new March 1978, repaired by PSA August 1982 (This is a pre-serial number model)
PS LCC & PS 3: new June 1979. Hardwired together with MIT MI-330 cable.
PS Moving Coil Amplifier: new June 1981. (Still in good working order, as far as I know. It hasn’t been used for about 30 years, but still lights up when you turn it on.) In original box with all interchangeable resistors to customize the impedance.
Original Owner. Located in SF Bay Area. Best offer.
Can only post one image, have plenty more.