WRUW Today?

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EU tradition--stop at a swatch store and see what's new. Blancpain x Swatch scuba green abyss this time!

 
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The watch is a third generation, but manufactured early in the production run (March 1968) just before Seiko updated the bezel. So it's an "error bezel" model but with a "correct" bezel. Also, inexpensive third-party Aqua Terra bands fit remarkably well.
It is not an error bezel. It was produced when the UK were trialling permanent daylight savings.