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Silver-tone stainless steel round chronograph watch with black dial and 44mm case

Citizen

Citizen BL5566-50E Eco-Drive Chronograph Watch 44mm Black Dial

SKU CH-V4YD-YVZSA MPN BL5566-50E

Eco-Drive light-powered chronograph with perpetual calendar, dual time and 100 m water resistance in a 44 mm stainless steel case

  • Light-powered movement never needs a battery change
  • 1/20-second chronograph measures up to 60 minutes
  • Perpetual calendar and dual-time display
  • 100-metre water resistance suits swimming and snorkelling
  • 44-millimetre stainless-steel case with mineral crystal

Timeless Styling for Work and Play

The Citizen BL5566-50E Eco-Drive Chronograph Watch combines classic aesthetics with practical functionality. Its 44mm stainless steel case and black dial suit professional environments and casual weekends alike. Solar-powered Eco-Drive movement eliminates battery changes for continuous operation.

Upgrade from Battery Quartz or Basic Analog

This model replaces watches that require periodic battery replacements or lack advanced complications. The jump is worth it when you need a perpetual calendar, dual time zone, 1/20 second chronograph measuring up to 60 minutes, alarm, and 12/24 hour formats in one reliable instrument.

Verify Wrist Fit and Water Needs

Confirm the 44mm case diameter and 12mm thickness match your preferred wrist presence. The 22mm band width uses a push-button foldover clasp with safety for secure closure. Ensure 100 meters water resistance aligns with your swimming or snorkelling intentions before ordering.

Highlights

  • Light-powered movement never needs a battery change
  • 1/20-second chronograph measures up to 60 minutes
  • Perpetual calendar and dual-time display
  • 100-metre water resistance suits swimming and snorkelling
  • 44-millimetre stainless-steel case with mineral crystal

Specifications

No published specifications for this item yet.

Questions about this item

What is the case diameter and lug width of the Citizen BL5566-50E?

The case measures 44 millimeters across and the stainless-steel band is 22 millimeters wide at the lugs.

How do I set the perpetual calendar and dual-time functions, and what step is often missed?

Pull the crown to the second position to adjust the calendar; the perpetual calendar auto-corrects for month lengths and leap years, but you must also set the leap-year hand position or the calendar will drift.

When will the Eco-Drive capacitor need replacement and what else wears out?

The rechargeable cell typically lasts 10 to 20 years; the mineral crystal can scratch and the push-button foldover clasp spring may fatigue after extended daily use.

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