A sophisticated blend of classic dress styling and exposed mechanical ingenuity, the Citizen NH9136-88A showcases fine Japanese watchmaking front and center. Defined by its signature open-heart aperture at 9 o’clock, this timepiece reveals the rhythmic heartbeat of the balance wheel and escapement in real time. Framed by a polished rose gold-tone bezel and matching dial accents, it offers an executive, two-tone presence suited for formal occasions, business attire, and elevated daily wear.

Housed in a well-proportioned 40mm stainless steel case, the clean silver-white dial features subtle radial texturing, applied rose gold-tone Roman numerals and hour markers, and a dedicated 24-hour subdial. Powered entirely by Citizen's dependable in-house Caliber 8229 automatic mechanical movement, it winds naturally with the motion of your wrist and supports manual hand-winding. Paired with a solid two-tone stainless steel bracelet, an exhibition case back, and 50-meter (5 Bar) water resistance, this watch delivers enduring mechanical charm without the high-maintenance upkeep.

Key Features:

 Open-Heart Mechanical Dial: A circular cut-out at the 9 o’clock position exposes the moving balance wheel, offering a captivating view into the mechanical movement.

 Warm Two-Tone Aesthetic: Rose gold-tone plating on the bezel, hands, indices, and bracelet center links adds a luxurious contrast to the brushed and polished stainless steel.

 24-Hour Indicator Subdial: A dedicated subdial positioned near 10 o’clock tracks daytime and nighttime hours in 24-hour military format.

 In-House Citizen Automatic Movement: Driven by Citizen Caliber 8229 with 21 jewels, self-winding and manual hand-winding capabilities, and a 40+ hour power reserve.

 Exhibition Case Back: Transparent mineral crystal case back displays the oscillating rotor and mechanical components in motion.

 Refined Proportions: Versatile 40mm case diameter designed to slide smoothly under a shirt cuff while retaining distinct wrist presence.

 Everyday Durability: Fitted with scratch-resistant mineral crystal, a secure fold-over push-button clasp, and 50-meter (5 Bar / 5 ATM) water resistance for everyday splash and rain protection.