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

original title: Exceed ENH-205 with caliber 1930
Vintage find with Citizen’s first thermocompensated movement, the cal. 1930. (But not necessarily the inaugural watch model of 1981.)

There is also a darker dial ENH-200. Catalog page shared by @Citizen _collector
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Citizen’s first digital TC movement, the caliber 1930