Your oldest gear?

My ears will be 70 years old, come March.

. . .still all original parts. . . 

B@W Matrix 8oo speakers.  Mark Levinson 335 amp

My speakers were made in 1978. ESS AMT 10B. I bought them for $190. 

I have a pair of B/W N803's and a pair of N802's in my vacation home.  Bought used in 1998 and still going strong.