Vintage 1997 Citizen OXY Chronograph men’s quartz wristwatch, reference 0510-L16631 Y.

Distinctive late-1990s Citizen design featuring a black multi-level dial, three chronograph subdials, luminous square hour markers, tachymeter scale, date window at 3 o’clock, and polished stainless steel tonneau-style case.

Powered by the Citizen 0510A Japanese quartz chronograph movement. Watch is running and functioning properly, including chronograph functions, and has a good/new battery.

Currently fitted with a black leather strap with contrasting stitching and polished buckle. The leather strap appears to be an aftermarket replacement rather than the original Citizen bracelet.

Pre-owned vintage condition with visible scratches, marks and normal wear to the case and crystal consistent with age and use. Please review photos closely for cosmetic condition.

Watch only — no original box or papers included.

Item Specifics

* Brand: Citizen

* Collection/Model: OXY Chronograph

* Reference: 0510-L16631 Y

* Caseback serial: 703635

* Year: 1997

* Movement: Citizen 0510A quartz

* Movement manufacture: Japan

* Display: Analog

* Dial: Black

* Chronograph: Yes — 3 subdials

* Date: Yes, 3 o’clock

* Tachymeter: Yes

* Case material: Stainless steel/base metal construction as marked

* Case width: approximately 38 mm

* Case length: approximately 51 mm

* Case thickness: approximately 12.4 mm

* Water resistance when new: 10 bar / 100 meters

* Crystal: Mineral glass

* Case shape: Tonneau/cushion

* Band: Black leather, likely aftermarket

* Department: Men’s / unisex vintage sports watch

The archived specifications reported for this reference give 38 mm width × 51 mm length × 12.4 mm thickness, mineral crystal and 10-bar water resistance.