[Introduction] This Citizen Promaster Eco-Drive Yachthawk is a high-performance sports watch designed with professional marine racing in mind. Combining a striking gold-tone case with a bold black unidirectional rotating bezel, it delivers immense wrist presence alongside premium tool-watch utility. The multi-functional analog-digital display features yacht racing timers, a chronograph, world time display, alarms, and a calendar layout, offering maximum practicality for marine enthusiasts and adventurers alike. [Historical & Collector Value] As part of Citizen’s legendary Promaster marine lineage, this model utilizes the advanced C660 Eco-Drive caliber, which converts light into energy to eliminate the need for regular battery replacements. Citizen's purpose-built tool watches are globally celebrated for their rugged resilience and engineering innovation. Discontinued specialized variations like this reference maintain a strong following among collectors of modern Japanese sports watches. Specifications ◇Brand: Citizen ◇Model: Promaster Eco-Drive Yachthawk ◇Reference: C660-S067634 ◇Case size: Approximately 44 mm (excluding crown) ◇Movement: Solar Quartz ◇Case material: Gold-tone base steel / Stainless steel back ◇Dial: Grey-brown multi-display ◇Crystal: Mineral crystal ◇Functions: Yacht racing timer, Chronograph, World time, Alarms, Calendar, Analog-digital display ◇Bracelet / Strap: Black rubber strap ◇Clasp: Buckle ◇Water resistance: 20 bar (200 meters) ◇Country of manufacture: Japan (Made in Japan) ・Condition Clean overall condition with light signs of age and normal wear. Fine surface scratches are present on the stainless steel caseback and outer metal surfaces from normal handled use, while the rubber strap remains flexible and ready for daily wear. ・Service History The watch has been checked for basic operation and is functioning at the time of listing. As with any solar-powered quartz watch, future maintenance may be required depending on usage, light exposure levels, and the buyer’s standards. ・Shipping & Customs The item will be carefully packed and shipped from Japan. International shipping is available. Please note that customs duties, taxes, and import charges are not included in the item price or shipping cost; these charges are the buyer's responsibility.