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My regular quartz run from +4 to +10 spm with my 30 year old Tag Professional being the most accurate. My Chronomaster runs +2 spy. I do love my HAQ!
 
Only have two I actually wear.

One is an Arnie reissue. It runs about +10s a month.

The other is a Darth Tuna. This one runs <1s a month, near as I can tell. Testing was suspended after about four weeks since it was determined to be good enough.
 
My Grand Seiko diver with the 5 day spring drive (mechanical, not quart drive) is spot on at 4 months time. I had no idea quart watches were that far off.

Ali
 
The Breitling Aerospace is currently by far my most loved quartz watch.
Nevertheless I also love the HAQ Certina DS Sport Precidrive. Both are
extremely accurate, solid and look good. The Certina has an accuracy
of +8 s/year proven in the field.

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Radio controlled around the globe.
Nope.
Well, unless you mean “in some locations scattered around the globe” ;)

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My quartz watches are accurate enough that I do not bother measuring how accurate they are.

- The last time I reset my Mudmaster (radio control does not work here), it was still well within a sec after a whole month.

- My square G syncs daily with BT (also has MB6, which does not work here and rarely ever worked when I was in France)

- My Sinn UX is HAQ. Accurate enough that I only reset the time for DST or time zone changes. I don’t remember ever seeing it more than 1-2 seconds off.
 
My sbgn003 Grand Seiko quartz is on pace to gain 3 seconds per year.

I’ve owned several 7c46 Tunas. The least accurate was gaining 8 seconds per month but typically they would gain or lose 3 to 5 seconds per month which is very good for non HAQ. My current Tuna is the most accurate I’ve owned and has lost 3 seconds since July 1st, so approaching HAQ.

I own several G shocks and the accuracy is not very good if it doesn’t sync. Usually +15 seconds per month. For the ones that sync, the time is perfect when I wake up in the A.M, but they are already visibly fast/slow by the time I go to bed.
 
- The last time I reset my Mudmaster (radio control does not work here), it was still well within a sec after a whole month.
Ugh, scratch that :oops:

It’s been my experience in all my years of ownership that my non-syncing Mudmaster was always within a second of my syncing square. And it was still the case last week when I managed a sync just ahead of the end of DST.

Well, less than a week later, it is 44 secs ahead! 😱 WTF Casio?!?!
 
For whatever reason most of my quartz watches perform within HAQ specs..even though only 1 of them is HAQ.
My “understanding“ (lol) is that the main difference between quartz and high accuracy quartz is thermo-compensation, i.e. compensating for the variations in timekeeping due to temperature changes. If your watches remain within a narrow range of ambient temperatures it would make sense that your standard quartz watches keep time within HAQ specs.
 
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