I like this a LOT, for those that are curious, it seems that the Calibre 2507 is a specific variant of the Calibre 2500 with the bullet rotor to show off through that display back.
One interesting question... if you're up for it... nobody has so far taken the caseback off one of these and photographed the rotor underneath the caseback, it'd be an interesting shot to take, as that rotor is the unique part of the movement that gives it the Cal 2507 designation (no doubt the 7 in 2507 is a nod to 007 as well). It would mean you'd be the first to open one of these watches for photos, but it'd be really cool to see if you were willing
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