What's the oldest piece of gear in your system?

Citation 16 power amp in beautiful condition. I don't use it any longer, but can't bear to part with it. Bought it new in 1977. It drove some JBL subs for a long time. One of the best woofer amps ever made.

My whole system, except for cartridges.

McIntosh MC40 monoblocks (62-69)
Sansui 1000A (68 or 69)
Altec 604-8g studio monitors (mid 70's)
Thorens 160 (mid 70's)

It has all been gone thru and freshened up, and it all works flawlessly and sounds great to me.

Ooops, I just noticed even this thread is vintage. LOL

Wow! Some of the listed items are pretty old. The oldest item I have in my main system is a totally refurbished McIntosh MR-73 tuner that I listen to almost every morning.
I am also about to list a pair of H.H. Scott two way speakers, Model S-10B, in walnut veneer here on Audiogon. I am the original owner; and they were part of a H.H. Scott compact stereo system I bought back in the late 1960s. The system served me very well, and was my first true stereo system.

1959 Pilot 402 receiver. Recently refurbished with NOS Siemens E84L output tubes and NOS brown-base Mullard 5AR4 rectifier. I believe this is the best-sounding receiver ever built.Through my 1986 Rauna Tyr II monitors and a Joseph Chow refurbished H/K Citation 14 tuner, this is the most musical sounding bedroom system I have ever had. I practically live in my bedroom now.

1959 Pilot 402 receiver. Waiting for return from partial restoration.