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Round 40 mm stainless steel case with black dial and leather strap

Citizen

Citizen Automatic 40 mm Black Dial Leather Strap NJ0210-05E Watch

SKU CH-7Y3F-R9N9X

A 40 mm stainless steel automatic watch with a black leather strap, sapphire crystal and 50 m water resistance

  • StyleCasual
  • MaterialStainless Steel
  • MovementAutomatic
  • ShapeRound
  • Dial ColorBlack
  • Dial MarkersNumeric-Stick
  • Automatic calibre 8210 runs without a battery
  • 40 mm stainless steel case fits comfortably under a cuff
  • Sapphire crystal resists everyday scratches
  • 50 m water resistance handles splashes and rain
  • 40 hour power reserve keeps time off the wrist

40 mm Automatic Stainless Steel Watch

This Citizen timepiece features a 40.00 mm stainless steel case paired with a black leather strap and a black analog dial. The automatic caliber 8210 movement runs without a battery and offers approximately 40 hours of power reserve. It is designed for daily wear in casual or office settings with a classic round silhouette.

50 m Water Resistance Practical Limits

Rated at 5 bar or 50 m water resistance, the watch handles splashes, rain and brief immersion during everyday activities. It is not intended for swimming, showering or any sustained water pressure beyond accidental exposure. The sapphire crystal and fixed stainless steel bezel add durability against scratches and minor impacts.

Automatic Movement Accuracy Range

The caliber 8210 specifies a daily rate of approximately minus 20 to plus 40 seconds, so timekeeping will vary within that window. Buyers who require chronometer-level precision or a tighter regulated rate should consider a different movement class. The see-through case back reveals the mechanical rotor for visual confirmation of operation.

Highlights

  • Automatic calibre 8210 runs without a battery
  • 40 mm stainless steel case fits comfortably under a cuff
  • Sapphire crystal resists everyday scratches
  • 50 m water resistance handles splashes and rain
  • 40 hour power reserve keeps time off the wrist

Specifications

BrandCitizen
StyleCasual
MaterialStainless Steel
MovementAutomatic
ShapeRound
Dial ColorBlack
Dial MarkersNumeric-Stick
DisplayAnalog
DateDate
Band MaterialLeather
FastenerBuckle
GenderMale
ConditionNew
BezelFixed-Stainless Steel
Case BackSee Through Case Back
Case MaterialStainless Steel
CrystalSapphire Crystal
Water-Resistant50m
Special FeaturesSapphire Crystal,Buckle Strap,Date Display

Questions about this item

What does the 40 mm case size mean for daily wear?

The 40 mm stainless steel case and 13 mm thickness sit comfortably under a shirt cuff and suit most wrist sizes for office or evening wear.

What does the automatic movement deliver in practice?

The in house caliber 8210 runs without a battery and provides roughly 40 hours of power reserve, with daily accuracy between minus 20 and plus 40 seconds.

What does 50 m water resistance allow?

The 5 bar rating handles splashes, rain and brief immersion; it is not intended for swimming or diving.

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