Though its not really a component...my George Nelson designed mono hi-fi cabinet, that acts as my gear-home/shelving dates to, well, the mono era.
The single JBL D-130 is the only part of this "component" that is actually used to make sound, though I do have a Dual 721 TT mounted in it. What sound does it make? Guitar sounds. The D-130 is an excellent guitar speaker. Yes, my hi-fi rig is occasionally used as a guitar speaker.
It has a 1970's Dual 721 formerly owned/fixed by Ohbythebay/Rob in the original TT slot. Though I managed to get it in there with the entire plinth and not just mounted on a board.
My oldest component is probably either my Dynaco MKIIIs or one of my turntables, probably my Empire 208 which dates to Nov. 1960.