The reason the HAQ watch is meaningful to me.

I’d like to share my example with all of you
Watch A is a HAQ watch. It steadily gains 0.4 to 0.6 seconds per month. In a year, it accumulates a gains 6 seconds.
Watch B is an RC watch. When it’s not synchronized, it gains 0.25 seconds per day. Due to environmental factors and usage habits , it can’t guarantee successful synchronization every day. The time interval between two successful synchronizations can range from 0 to 10 days.
If we consider watch accuracy , Watch B seems superior…

The reason the HAQ watch is meaningful to me.

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On the origins of short-cycle logical regulation aka digital count adjustment

For a long time, members of this forum thought inhibition was the only feasible method for ‘modern’ (ie single crystal 32 kHz) HAQ. Some members, like Catalin, suspected alternatives based on technical manuals, but the specifics remained vague. Thanks to (Japanese) sources I have found and shared, we now know many of the specifics, not only about early analog TC, but also alternative methods to inhibition, like time-division capacitor switching. Most general info comes from a…

On the origins of short-cycle logical regulation aka digital count adjustment

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Longines VHP Hand Alignment Question

Hi all

It’s some time since I posted here. I hope someone can help with my question.

I have just acquired a new Longines VHP watch. When it arrived, the seconds were running 2 seconds fast, but I left it alone as I read here and elsewhere that the hands would auto-correct. Will they did, in a manner of speaking, as the second hand, when hacked, now sits at the 56 second marker. Also, although the time seems correct to the second, the watch is pulsing the minute hand at 06, 16, 26, 36…

Longines VHP Hand Alignment Question

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Review – The Citizen AQ4100-65H

At long last, here are some photos of and thoughts on one of my new HAQs. Disclaimer that I have sadly already nicked the bezel, so if you notice that in the shots, know that is not a defect on Citizen’s part. I also apologize for the fingerprints and dust that inevitably show up.

Basics

From Citizen’s site:
Width: 38.3mm
Thickness: 12.2mm
Material: Titanium with “duratect” treatment
Lug space: 19mm
Lug to lug: 45.5mm
Water resistance: 10ATM

Dial, Bezel, and Furniture…

Review – The Citizen AQ4100-65H

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