Oldest gear still for sale is . . .

What about the 300B Audio tube? Available in 1938...

Dweller, I thought of tubes, but those are just parts. So, no, not what I was thinking of. 

Yogiboy, I thought of the MC275 but that's gone through a lot of changes, plus it had been discontinued. So what in thinking of, continuous and unchanged. But yes, the Mac275 is long lived. 

Ebm, it's not important. None of this is important 

It's been updated over the years, of course, but Vandersteen's Model 2 has been around for 40 years.  2cis, a Yamaha c2a, a Moscode 300, and an AR table w a Signet TK7E was my first "high end" system. 

Ahhh, yogiboy beat me to it!

Paul W. Klipsch launched the Klipschorn loudspeaker in 1946, 71 years ago, when Truman was in the White House.

Ah, the K-horn! How did I miss that?