Some years ago I attended a conference in Tsukuba, Japan. One evening I took a walk around the city and came across an interesting looking junk shop.
There was an anonymous looking wooden box on one particular shelf. Inside I found this lovely old microscope. I couldn't examine it too closely as it was bolted into the box from undermeath. But it was very reasonably priced, so I bought it anyway.
Once I returned to my hotel I had the chance to look at it in more detail. It appeared in as new condition and there was not a mark or even a fingerprint on it.
It is dated August 1942 and is in perfect working order.