The Citizen NH9130-17A is a sophisticated "Open Heart" mechanical watch. It belongs to Citizen’s collection of accessible automatic timepieces, offering a classic dress watch aesthetic with a mechanical twist.
Automatic Caliber 8229 (Self-winding + Hand-winding)
The defining feature is a circular cutout at the 7 o'clock position, allowing you to see the balance wheel—the beating heart of the mechanical movement—in motion.
The back of the watch is transparent (mineral glass), letting you view the rotor and gears from the underside.
For its price point, the inclusion of a Sapphire crystal is a major advantage, as it is much harder to scratch than the mineral glass found on many other entry-level automatics.
At 40mm, it hits the "sweet spot" for modern dress watches—large enough to have presence but slim enough to slide under a shirt cuff.
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