Accuracy of El primero 3600

Well, I don’t own one, but I’ve paid attention to that movement and all reports agree that it’s very accurate and robust for a chronometer. I imagine that you’ll want to set it every once in a while. I set my watches often, just for the joy of interacting with them. Oh, and to satisfy my compulsion to watch the seconds hand hit 12 exactly as the minute hand aligns with the indices or minute track. That’s fun!

Mine has been running about -2 or -3seconds per day. I’ve been finding it acceptable and not bothersome.

Both of my EP's are + 1 - 2 sec

Does it have hacking?

Well four seconds a day is well within chronometer spec and is still very good for a mechanical watch

Beautiful watch

I’m getting insane accuracy, amplitude and zero beat rate error on my Chronomaster original with the new movment. It’s -2/-3 seconds per week slow on average. My Chronomaster open with the older 400 series movment is about -6 per day but healthy other wise. That ones for special occasions so it doesn’t bother me.

COSC chronometer standard is -4 to +6 seconds a day. +4 is well with that. Ultimately these days luxury mechanical watches are fashion / personal statements. For a truly accurate time to the second we all have our phones to look at.

I wouldn't enjoy mechanical watches if I ruminated over a deviation of +/- 4 secs per day; that would spoil it for me I think.

I'd be much more likely to enjoy a watch If I focused on celebrating how 278 individual components are assembled into a package of 5.7mm X 30mm to achieve a consistent accuracy of 99.99537037037%, which is +/- 4 secs per day expressed as a percentage.

I have a prescription. Wear this watch for a weekend. You won’t mind a few seconds a day so much. lol.

If accuracy is what means most to you, get a Casio G-Shock with Multiband 6 with Tough solar and be done with it. You buy mechanical watches for reasons other than accuracy and you will can be happy. Hell, my phone has better time keeping than any of my mechanical watches.

I have a 23 year old Zenith Rainbow El Premero I have worn it a lot it’s damn near perfect

Cosc is -4 to +6 sec a day so I feel he can't complain to much right? Metas I think is 0 to +5 sec a day.

Is it 330 then?

I'd be pretty happy if all my watches were within 4 seconds deviation a day.

Mine is -5 to +1

Gorgeous watch!

If you’ve not already done so, try letting the watch rest overnight in the various positions (dial up/down, crown up/down, crown right/left) to determine if the watch will gain time in any of them. If there is a resting position that gains time you can drive the avg daily rate up.

For a 12k watch I don't expect one that barely fulfills the criteria of the "easiest" certificate that watches for 1/10th of the price fulfil...

Yes

Most certainly!

Is it still under warranty? Maybe bring it in?

I probably will. But I don't want to part with it for a few weeks 😂😱😭

Haha I understand. I brought in my Oris big crown pointer date under warranty and it took a couple months I think and I really did miss it but it had to be done. The winding was very grainy and you could feel something loose inside. I was really happy when it came back.

Are chronographs in general less accurate than watches without the complication?

No. But they’re more complex and require more complicated repairs. Hence cost more to maintain.

That was a good idea. Turns out that face down it slowly gains seconds. That averages out the loss of seconds when wearing it during the day. So in the end I should end up with -1 or -2 seconds per day of wearing it. With that insight I am happy again!

The Tudor has a smaller beat error in the different positions. That's why it's so accurate. Very impressive!