I'm fascinated by old technology, industry and transport. I love to see the ingenuity of the mechanisms that make them work, and the way that even the most functional hidden parts are often so much more ornate and well-crafted than is strictly necessary - the pride in the craftsmanship is so plain to see, and I like to imagine the lives of the people who made them.
The only vintage things I own are a few old cameras - nothing rare, mostly post-WWII Soviet ones, as they are so cheap, and often copies of much older designs. I still run a film through each of them once in a while, and there's something so satisfying about taking a good shot with such basic, but well crafted, kit.
I live in an area which was one of the big centres of the industrial revolution, so I'm lucky enough to be surrounded by old industrial remains, mines, tram/railway lines etc. too. The architecture of the buildings has a lot of the same qualities of craftsmanship as the the things produced there, even though they're the old equivalent of an ugly modern industrial unit. We also have some excellent local museums full of all sorts of interesting vintage industrial tools, consumer goods and vehicles. I'd rather have the stuff myself though, so that I could get my tools out and strip them down to admire all of the workings.
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When you are fighting an invisible monster, first throw a bucket of paint over it.