Problem with Chrono?

[Evmw]

I just bought a new Speedy Professional Moonwatch from Jomashop and once I would it and checked the chronology function, I found something odd:

When the chronology second hand moves between 59 seconds and 1:00, the minute sub-dial advances to show 1min. So, If i stop the chronology at 59.3 or 59.5 seconds, the watch will register 1:59.5.

Has anyone else seen/experienced this? It seems like it shouldn't be happening. I looked at a friend's speedy (different model) and his chronology behavior seemed normal. Thinking I should probably return it as defective?

Thanks for any advice!

-Evan

[geebob]

Congrats on your Speedmaster
Mine behaves like yours too. It doesn’t bother me, I use the chronograph function quite often...at least once a day... and for my use that doesn’t have any effect at all.

[AEC]

This is normal. Your Speedmaster Professional with Caliber 1861 features a "jumping" minutes register, meaning that the minutes elapsed are advanced as you describe. The chronograph's elapsed time should be read as minutes registered on the chronograph's minutes sub-dial, plus seconds registered by the chronograph's central seconds hand.

[Pius XIII]

Same experience here on my last speedmaster. From my research this seems to be quite typical on most speedies.

[mps354]

Mine does that as well, it's normal

[Vicc]

Originally Posted by Evmw

I just bought a new Speedy Professional Moonwatch from Jomashop and once I would it and checked the chronology function, I found something odd:

When the chronology second hand moves between 59 seconds and 1:00, the minute sub-dial advances to show 1min. So, If i stop the chronology at 59.3 or 59.5 seconds, the watch will register 1:59.5.

Has anyone else seen/experienced this? It seems like it shouldn't be happening. I looked at a friend's speedy (different model) and his chronology behavior seemed normal. Thinking I should probably return it as defective?

Thanks for any advice!

-Evan

It's working as intended. Don't worry about it. Well not as intended but these are the mechanics of the movement. It's just the way it works.

[Evmw]

Originally Posted by AEC

This is normal. Your Speedmaster Professional with Caliber 1861 features a "jumping" minutes register, meaning that the minutes elapsed are advanced as you describe. The chronograph's elapsed time should be read as minutes registered on the chronograph's minutes sub-dial, plus seconds registered by the chronograph's central seconds hand.

I think this is the issue - the minute counter seems to "creep" and not jump. I compared to my friend's Automatic 3515.20 SS Speedmaster Date with white dial (couldn't find the exact movement), his did "jump" to the 1min mark on the sub-dial when the chrono second hand crossed the 60 second mark. My problem is that my speedy creeps the second hand subdial for a full second between 58.5 and 59.5 seconds, and the minute subdial registers the minute as being completed before60 seconds has elapsed if you stop the chrono at 59.5 seconds.

[AEC]

Watching mine, I guess it's possible the chronograph's minutes register advances a fraction of a second before the chronograph seconds hand passes top-dead-center. My sense is you could ask Omega to correct this, but their response may be to inform you that your watch is performing as designed.

As for the hand of the hours register not being centered, I suppose you could also ask them to correct this. It should be centered with the chronograph not running and reset to zero.

Speedmasters produced prior to 1968 used Caliber 321, which was prone to having its hours register creep a tiny bit. Without switching the chronograph on, an owner may have observed the hours hand advancing a tiny distance over the course of, say, a month or so. If he pressed the button to reset the chronograph, he would see the hand on the hours register move a tiny distance back to top-dead-center.

If you think your watch's hours register may be creeping like this, then use your watch without activating the chronograph for a couple of weeks, and observe the hand in the hours register to see if it seems to be advancing a tiny distance. If so, then you might ask Omega to correct that. I'm sure this is not a common problem with Caliber 1861 in the contemporary Speedmaster Professional, though.

[GTS Dean]

My 4030 Zenith Daytona has a little bit of creepiness with the 30 minute subdial hand, but it does snap. Both my Speedies snap pretty cleanly.

[ap1]

Normal

[Evmw]

Below is an image of the issue. seems off to me that it would have started advancing at 58sec and completed the tick to 1min at 59 sec as shown

IMG_5638.jpg

[AEC]

Originally Posted by Evmw

Below is an image of the issue. seems off to me that it would have started advancing at 58sec and completed the tick to 1min at 59 sec as shown

Attachment 923990

Where did you buy the watch?

[Evmw]

Got it at Jomashop

[eugeneandresson]

Mine does it to. And it doesn’t bother me at all.


Sent from my iPhone using Tapatalk