The specially adjusted 9F models

@BrianBinFL and I have assembled the following list of the 9F watches, which halve the usual 10 seconds a year tolerance to just 5 seconds a year through special adjustment at the factory. Most feature a ‘gold star’ on the dial, but not all.

From newest to oldest they are:

1. SBGP017 in 2022, the ‘Shinshu Sea of Clouds’ for the 55th anniversary of the 44GS case; with 9F85 and display back
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The specially adjusted 9F models

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GS purchased in 2025 made in 2023?

I’ve been googling the serial number meanings of GS and I learned a watch I bought for my wife was made in 2023. 2 years seems like a bit of time between when the watch was produced and when it was sold (I bought it from the GS online boutique for reference). I am curious what the first number is of the serial numbers are of your GS watches?
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SBGN027 on my radar

Hello fellow GS enthusiasts. Over the years, I have owned and enjoyed several GS references, including quartz, spring drive and high beat. Due to my local Rolex AD calling me about a DJ41, I reworked my collection, currently have zero Grand Seikos, a…

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