Actually, I do
...though not overpolished....
It looks to have been put in a lathe and machined to removed case back gouges.
1) the other EPSA chrono cases with slots instead of the tetradecagonal back are polished without the circular machining marks.
2) if you look at the slots, they are deformed...yet the caseback show almost no signs of use/wear (except for an obvious scrape). That circular machining pattern shows everything...worse than a polished back...yet this one...nothing. It's freshly machined.