How about this
Marconi wireless receiver, which was on a ship that sank in 1918, was recovered from the ocean bottom in 1999, and subsequently restored to beautiful condition (albeit only after years of effort)? See the section headed "Type 16 Crystal Receiver" in
this article (the link doesn't seem to work consistently, though, and if it does be patient waiting for the photos to download).
The online article doesn't include a photo of the set in as-found condition, but it is included in the print edition I have, and as found it looked like what you might expect it to, following 81 years at the bottom of the ocean.
Regards,
-- Al