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

This site is here for the buying and selling of Audio equipment. This causes me to wonder if most of us have relatively new equipment. If most of it is new, what is the oldest piece of equipment still in use, and why are you still using it?

My oldest piece is a Sota Star Sapphire, but it has been upgraded. It was originally purchased as a Sapphire in the 80's, but was upgraded to a Star Sapphire about two or three years ago.

What's your story?
1965 ElectroVoice 12-TRX's in 1959 Aristocrat cabs. They still sing sweet as ever, as the day I purchased them in '65. Although I do have a late 1920's - 1930's Lafayette 2 channel (Globe 45's) amp with matching field coil speakers that I listen to from time to time for music of that period.
The oldest piece of gear in my possession is a pair of Scott "bookshelf" speakers that were purchased by my father in 1967. The "bookshelf" designation was always questionable in my eyes because they are very heavy and have such prodigious low frequency output that I would expect them to propel themselves off of most of the bookshelves that I have seen. I also have a Nakamichi 600 cassette deck from the mid 70s, a Syrinx PU-2 tonearm from the early 80s, and one of the original VPI HW16 record cleaners, all of which work quite well.
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.