No clue. But I find it strange that a brand would purposefully change the dimensions (or aspect ratio) of their own logo like that. I understand it's quite likely Omega did just that, but I don't understand why any company would compromise their own brand marks by making them "sort of similar" instead of precisely identical from one product to the next. Especially a logo as simple as that one. The Omega logo could be - and in my opinion, should be - like the Nike swoosh logo or the Apple logo. The very same over long periods of time.
I mean, I know precision is generally not the name of the game when it comes to mechanical watches, but still. You'd think a marketing guy in Switzerland would get a grasp on the Omega logo at some point.