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@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
[IMG width="500px"…
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