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SLGB001/003 date change speed

Now that SLGB001/003 have begun to arrive in owners hands, can anyone report on the date change speed of the cal. 9RB2?

The 9RA5 in the SLGA001 was found to have semi-instantenous date change. According to a comparison by @chief-diversity-officer:

9…

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Grand Seiko News from the Watch Industry rk watch service

A little fun prompting AI about HAQ

I tried a handful of vendors

A. OPENAI
I asked basic ChatGPT, "Can you summarize the High Accuracy Quartz forum on watchuseek?"

Response:

…

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High Accuracy Quartz watches News from the Watch Industry rk watch service

The Grand Seiko case styles of today

Thanks to the newly-added Case Style field in @Plus 9Time 's GSDB, a systematic grouping of all models by case design has become possible.

Junp to PDF v1.1 (September 2025)

This is a first stab, restricted to only full size references released 2…

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Grand Seiko News from the Watch Industry rk watch service

Tabular summary of all modern GS models

This thread tabulates all known GS releases by (only) the following parameters:

ref
any qty, geograhic, or retailer limitation
year of release

Data source is @Plus 9Time web site

HIGHLIGHTS (click on links):
Spring Drive 3-hand automatics
Spring Dri…

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Grand Seiko News from the Watch Industry rk watch service

Tabular summary of GS releases 2018-present

This thread will summarize GS releases by (only) the following parameters:

ref
any qty, geograhic, or retailer limitation
year of release

Data source will be @Plus 9Time web site

Edit 1: latest PDF is in post #14.

Edit 2: The precise procedure for …

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Grand Seiko News from the Watch Industry rk watch service

Taking stock of Grand Seiko’s quartz intentions

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,…

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High Accuracy Quartz watches News from the Watch Industry rk watch service

GS release statistics, and where GS says it is going

Using the GSDB provided to the community by @Plus 9Time , this is the number of new* GS references released each year:

The i…

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Grand Seiko News from the Watch Industry rk watch service

Tabular summary of GS releases 2020-present

This thread will summarize GS releases by (only) the following parameters:

ref
any qty, geograhic, or retailer limitation
year of release

Data source will be @Plus 9Time web site

Edit 1: latest PDF is in post #11.

Edit 2: The precise procedure for …

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Grand Seiko News from the Watch Industry rk watch service

Positional Variation Investigation (2025)

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…

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High Accuracy Quartz watches News from the Watch Industry rk watch service

Citizen AQ6021 review in parts

A deep dive into my first series Caliber 0100

Part 1 measurements

…

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High Accuracy Quartz watches News from the Watch Industry rk watch service
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