In a June 2024 Horobox interview (video link), Seiko Watch Corp. boss Akio Naito was asked, "What do you think of the [GS] quartz calibers? What is the positioning in the market? What are you expecting in the future?"

Naito:

"Actually,…

So I've been looking for a field/military/tool watch option.

For reference, if my Citizen Promaster Tough (BN0118-04E) had a HAQ movement, I'd be done. But it doesn't, so here I am.

The two pieces that popped out for me were the Marath…

This is a re-do of last year's investigation into positional variation of HAQ movements. The term refers to the slight change in rate of the watch depending on how it is stored.

This placeholder post #1 will be later edited to summarize the threa…

A deep dive into my first series Caliber 0100

Part 1 measurements

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Is it possible to tweak a 99xx Seiko caliber as a user without a 99?
Secondary and Main quartz, which to turn and how much, and without temperature regulated environment? Is it even possible?
Any tips & trix are appreciated

First of all, a few disclaimers:

I consider ‘HAQ’ to be ‘a watch whose manufacturer claims <10spy AND holds up to that specification in real life under a reasonably defined temperature range, USUALLY adopting some form of high frequency oscillator,…