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Silver open-heart dial automatic watch on stainless steel bracelet

Citizen

Citizen Luna Open Heart Silver Dial Automatic Watch PR1040-88A

SKU CH-BF51-NHMWK

An open-heart automatic dress watch with a 28.50 mm stainless steel case, silver dial and sapphire crystal, water-resistant to 50 m

  • StyleDress
  • MaterialStainless Steel
  • MovementAutomatic
  • ShapeRound
  • Dial ColorSilver
  • Dial MarkersDotted With Roman Numeral At 12, 3 & 9 O'Clock
  • Open-heart dial reveals the automatic movement
  • Stainless steel case and bracelet resist daily wear
  • Sapphire crystal protects the silver dial from scratches
  • Water-resistant to 50 m for everyday splashes
  • Caliber 6628 powers the watch without batteries

Citizen Luna Open Heart Automatic Watch

The Citizen Luna PR1040-88A is a dress watch designed for women who value mechanical craftsmanship. Its open-heart silver dial reveals the automatic calibre 6628 in motion. A 28.50 mm stainless steel case and matching bracelet secure with a deployment clasp. Water resistance is rated to 50 metres.

Sapphire Crystal And Deployment Clasp

The sapphire crystal protects the dial from everyday scratches far better than mineral glass. A deployment clasp closes the bracelet with a single motion and reduces wear on the links. The pull-push crown sets the time and winds the mainspring when the watch has stopped. Roman numerals mark 12, 3 and 9 o'clock alongside dotted indices.

Automatic Movement Practical Limits

The calibre 6628 runs only while worn or recently wound; it will stop after roughly two days off the wrist. No battery exists to replace, but the movement cannot be hand-wound via the crown alone. The 50 metre rating suits splashes and brief immersion, not swimming or diving. A fixed bezel offers no timing function.

Highlights

  • Open-heart dial reveals the automatic movement
  • Stainless steel case and bracelet resist daily wear
  • Sapphire crystal protects the silver dial from scratches
  • Water-resistant to 50 m for everyday splashes
  • Caliber 6628 powers the watch without batteries

Specifications

BrandCitizen
StyleDress
MaterialStainless Steel
MovementAutomatic
ShapeRound
Dial ColorSilver
Dial MarkersDotted With Roman Numeral At 12, 3 & 9 O'Clock
DisplayAnalog
Band MaterialStainless Steel
FastenerDeployment Clasp
GenderFemale
ConditionNew
BezelFixed Bezel
Case BackPull/Push Crown
Case MaterialStainless Steel
Case Thickness28.50 mm
CrystalSapphire Crystal
Water-Resistant50m
Special FeaturesSapphire Crystal,Deployment Clasp,Pull/Push Crown

Questions about this item

Does the 6628 automatic movement need periodic servicing like a traditional mechanical watch?

Yes, the automatic calibre 6628 should be serviced every few years to keep lubrication fresh and maintain accuracy.

What stops me from wearing this watch continuously during long days?

The 50 m water rating limits swimming or showering, so remove it for prolonged water exposure.

Will the stainless steel case and bracelet become noticeably warm on the wrist after all-day wear?

Body heat warms the metal slightly, but the thin 28.50 mm case dissipates it quickly and stays comfortable.

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