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The Encyclopedia of Horology

Wristwatch · Dress watch

Omega 14k Square Dress Watch, Ref. D 6650

Partially verified

This Omega reference D 6650 is a mid-1960s square dress wristwatch crafted in 14k gold, measuring 27 mm across. Produced for the American market, the case features an openwork floating outer frame adorned with a textured Florentine-style finish. The silvered dial features applied hour markers, double baton indices at 12 o'clock, slender baton hands, and a printed 'SWISS MADE' designation at the base. The timepiece is driven by the manual-wind Omega caliber 620 movement.

Front view of the Omega 14k gold square dress watch showing the floating frame, silvered dial, and leather strap
Front view of the Omega 14k gold square dress watch showing the floating frame, silvered dial, and leather strap — Christie's. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
onlineonly.christies.com
Category
Wristwatch · Dress watch
Maker / attribution
Omega
Reference
D 6650
Catalogue / lot identifier
2
Source-reported date
circa 1964
Country
Switzerland

Source-reported attribution and specifications are not independent authentication. A listing does not establish present ownership, current display, availability or permission to reproduce.

Object description

Case Construction

The timepiece features a 14k gold square case with an openwork, floating frame design. The exterior surfaces exhibit a Florentine-style textured finish.

The case is described as being in good condition with light scratches, and some small nicks present on the bezel, case back, and the 3 o'clock side near the crown. A hallmark is present and described as crisp on the case back.

Evidence for this section
  • “unique "floating" frame case”
  • “Florentine-style textured finish”
  • “The case is in good condition with some light scratches.”
  • “There are some small nicks to the side of the case on the 3 o'clock side, above the crown.”
  • “The hallmark is crisp to the case back.”

Dial and Hands

The watch features a silvered dial with applied hour markers, an Omega signature, and slender hands, all noted as appearing original. The dial exhibits signs of age around the edges, including intermittent small black spots.

The hour markers, Omega signature, and hands have developed a light patina. The hands exhibit minor signs of wear with small scratches observed at the base.

Evidence for this section
  • “The dial and hands are in good condition and appear to be original.”
  • “The dial shows signs of age around the edge of the dial.”
  • “There are few intermittent small black spots throughout the dial.”
  • “The hour marks, OMEGA sign, and hands have developed a light patina.”
  • “The base of the hands show signs of wear with small scratches.”

Movement and Maintenance

The watch is powered by a manual-wind Omega caliber 620 movement. The interior of the case back features historical watchmaker's marks.

At the time of cataloging, the movement was observed to be in working order; however, it has not been tested for accuracy, and a service is recommended.

Evidence for this section
  • “CALIBER: 620”
  • “The inside of the case back has watchmaker's marks.”
  • “The movement is in working order at the time of cataloging”
  • “The movement has not been tested for accuracy.”
  • “A service is recommended given the age of the watch.”

Open research questions

  • What specific watchmaker service marks are etched into the interior case back that might suggest the watch's maintenance history?
  • Does the 14k gold hallmark indicate a specific US-based case manufacturer used by Omega for this American-market model?

Source evidence

Recorded claims and source quotations for Omega 14k Square Dress Watch, Ref. D 6650
FieldSource-reported valueSource quotation
Circa1964“CIRCA: 1964”
Case Material14k gold“CASE MATERIAL: 14k gold”
Case Diameter27mm“CASE DIAMETER: 27mm”
Caliber620“CALIBER: 620”
Movement TypeManual“MOVEMENT: Manual”
Dial FinishSilvered“DIAL: Silvered”
Market OriginAmerican market“The watch was made for the American market”

Visible details

  • Square inner case suspended inside a cut-out outer frame with textured Florentine finishing.
  • Silvered dial with applied golden baton hour markers and 'SWISS MADE' printed at 6 o'clock.
  • Dark brown leather strap with contrast red-brown stitching.
  • Fluted winding crown positioned at 3 o'clock within the open frame structure.

Research qualifications

  • Movement and interior case back are not pictured in the provided view.
  • Source notes the movement was not tested for accuracy.

Photograph identity and source facts were screened before import; rights clearance remains pending.

Consulted source

OMEGA, 14K SQUARE DRESS WATCH, REF. D 6650, | Christie’s

Reviewed 2026-10-22 · Record 4c5c19f440

Terms in this record

Glossary explanations for terms named in this object’s record.

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