A few weeks ago, a local thrift store had a Rolex Submariner in the showcase. I asked to look at it--They wanted $700. I came to the conclusion that it was more than likely fake--I'm no expert, but the brushed surface looked coarser than I would expect. It was a mechanical movement, but only ticked 6 times per second. Most modern Swiss watches tick 8 per second. According to my (later) Googling, the Submariner switched to 8 per second in the late 1980's.
A co-worker has an interest in mechanical watches, and is also a thrift-store shopper. I would have told him about this watch, but he was on medical leave at the time.
When I came to work today, he was wearing it.