Estate found. Minor wear typical of normal use. But surprisingly nice for its age. I picked it up and rocked it and it took right off. Not tested for accuracy or duration. Great dial. The dial design is neat because when the light is right the 12 o'clock and 6 o'clock sections are slightly darker than the rest - see picture two. The hands rotate nicely with crown extended. "M2" date code which is 1962.  A nice example.