Wish I knew. I bought it like that. I'm guessing moisture got in and left in a drawer, then dial cleaning gone wrong. The movement is surprisingly clean though. No pitting that I can see. And the "Zenith automatic", "Swiss Made T", and the minute markers all look like original and not reprint so I'm not sure about the dial scrubbing. Unless you can scrub the colour off the dial without scrubbing off the printing? But the tritium has all turned black suggesting moisture in the dial at some point. Dunno but I like it. It's got some kind of true history.
New shoes! They just arrived... ... and I put them on just in time to wear to the Melbourne Comedy Festival Roadshow.