My oldest VCR is a 77' Zenith jr-9000w two speed Betamax top loader with orig dust cover (the handle on the speed switch was broke off though), bought it at the ARCI donation auction for a whopping 1$. After lubing a stuck (still not too good) motor I was able to get monochrome video with red blue and purple noise which soon disapeared and left me with just mono video and audio .
I'll start a resotration thread after I finish some projects I have going.
My oldest VTR is either a circa 1975 Sony AV-5000A or a Concord (can't remember the model #) both use the EAIJ reel to reel monochrome video recording standard (hence Video Tape Recorder VTR instead of Video Cassette Recorder VCR), though the Sony has non-standard color capabilities(if you are curious check out this link
labguysworld.com/Sony_AV-5000A.htm.
Got some other vintage decks, but I think I'll limit it to the oldest.
Tom C.