I actually love the fact that few of the cameras I find have something personal in them. Marks from it's previous owner.

I agree with this. I have a number of items I've picked up over the years that have previous owner's marks on them. One of my favourite is actually an old album that was used to hold 78rpm records. It has "MAMIE" printed in clear letters down the spine. The person I picked it up from told me that they called her grandma "Mamie." It's not my Mamie, but still something I enjoy.

Those old cameras are fantastic. I like the light circles on the first, and the fungus and such on the second really give it a neat characteristic; it looks almost like fairy dust.