When does the date jump over in a cal. 752?

Hey folks,

I've just received a beautiful example of a 166.032 from our very own @ConElPueblo , sporting a cal. 752 that runs very smoothly.

When going through the lengthy process of setting the day and the date, I noticed that the day disk jumps over at midnight, yet the date does so at exactly 5am. It's been a while since I last owned an Omega with a 752, so I was curious if any of you could tell me if it's designed to work this way (maybe for both functions not to interfere) or if it's an "issue" that I might have adressed by my watchmaker?

I'd like to point out, in all fairness, that this is not to criticize the seller in any way - he's as curious as I am, so this is for educational purposes only, not to re-negotiate or express any hard feelings.

Thanks a lot, looking forward to be enlightened!

They should change basically at the same time. This is something that can be adjusted if your watchmaker knows how.

Cheers, Al

Here is an example - before adjusting:


And after:


Cheers, Al

Thanks a lot @Archer
As always. 😀

As mentioned by @Archer, it's not an intrinsic feature of the movement, but more reflective of how it has been adjusted. Personally, I wouldn't worry about it. Your watchmaker will sort it out at the next service.

Thanks for the feedback. Doesn’t worry me one bit - actually, I sympathize with that. To me, the new day starts when I’m done sleeping, not when the clock strikes midnight. Come to think of it, I might ask him to adjust the day disk to do the same. 😁

It's a simple adjustment of the day finger, shown below at the red arrow: