You're not wrong. I have my grandfather's pin pallet movement Oris from the 1950s. It had a nickel plated brass case that has evenly worn apart from the cashback which is heavily pitted. The original dial is in great condition. It stopped a couple of years ago and sent it to Andrew Charles watchmakers. They were the service centre in the UK for a while. I thought they would have replaced the whole movement but said they didn't, just replaced the worn parts. Now it keeps very good time but I rarely wear it as it has not an ounce of water resistance and has huge sentimental value if no actual value.
When I bought it I only had my Rolex OP and wanted a black faced watch as an alternative to the Rolex's white. Now it is one of a dozen or so but still has a regular place in my rotation.
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