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Rolex Diamonds and Rubies String Dial Day-Date Ref. 18378 in 18k Yellow Gold
Rolex Diamonds and Rubies String Dial Day-Date Ref. 18378 in 18k Yellow Gold Rolex Diamonds and Rubies String Dial Day-Date Ref. 18378 in 18k Yellow Gold Rolex Diamonds and Rubies String Dial Day-Date Ref. 18378 in 18k Yellow Gold Rolex Diamonds and Rubies String Dial Day-Date Ref. 18378 in 18k Yellow Gold Rolex Diamonds and Rubies String Dial Day-Date Ref. 18378 in 18k Yellow Gold Rolex Diamonds and Rubies String Dial Day-Date Ref. 18378 in 18k Yellow Gold Rolex Diamonds and Rubies String Dial Day-Date Ref. 18378 in 18k Yellow Gold Rolex Diamonds and Rubies String Dial Day-Date Ref. 18378 in 18k Yellow Gold Rolex Diamonds and Rubies String Dial Day-Date Ref. 18378 in 18k Yellow Gold Rolex Diamonds and Rubies String Dial Day-Date Ref. 18378 in 18k Yellow Gold
Lot 105
Rolex

Diamonds and Rubies String Dial Day-Date Ref. 18378 in 18k Yellow Gold

Ref. 18378
Sold forCHF 20'000
Total bids7
EstimateCHF 13'000 – 26'000
LocationOffice, Zurich
  • No buyer’s premium

Reasons to Bid

Day-Date collecting is wide-ranging because of the many dial and bezel variations produced over time. The reference 18378 shown here is notable for its use of precious stones. The bezel features four rubies at 3, 6, 9, and 12, matched with a ruby-index diamond dial, creating a clear and deliberate visual theme that will interest collectors looking for a less common combination. This model belongs to the 183xx generation, which introduced technical improvements to both the movement and the case. It is powered by the automatic Caliber 3155, which includes the double quick-set function, allowing the day and date to be adjusted independently. Superlative Chronometer certified and built for everyday reliability, the movement reflects Rolex’s focus on stable performance. Together, the gem-set design and upgraded mechanics make this 18378 a strong representative of the Day-Date line.

CaseRound case in 18k yellow gold with crown at 3 o'clock, diamond-set bezel with rubies at 12, 3, 6, and 9 o'clock, solid caseback
Bracelet3-link 'President' bracelet in 18k yellow gold with hidden folding clasp, maximum wrist circumference: 17.5cm
DialGold sunburst dial with applie diamond string, rubies at each hour marker, luminous gold hands, day at 12 o'clock, date at 3 o'clock, signed 'Rolex' at 12 o'clock
MovementAutomatic mechanical movement Cal. 3155, functions: hours, minutes, seconds, day, date
Cal.3155
Ref.18378
Movement No.7214464
Case No.W422978
Diameter:36mm
Lug-to-lug44mm
YearApproximately 1995
Case:Good, signs of wear
Bracelet:Good, signs of wear
Dial:Very good, minor patination and discoloration
Movement:Good, all functions working properly
Amplitude (Dial on top/Lift angle 52):Approximately 280°
Accuracy (Dial on top):Approximately +10 sec/day
Watch only:Yes
International
Shipment & Pickup Customs duties and taxes may apply. Ships from: Zurich, Switzerland Authenticity
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