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The Encyclopedia of Horology

Marine chronometer · Marine chronometer

Panerai Ref. OP 6672 PAM 245 Marine Chronometer

Partially verified

This Panerai marine chronometer, reference OP 6672 PAM 245, is a limited edition piece numbered K06/30. Sold on September 26, 2009, the instrument features a brushed steel bowl with a screwed-down bezel, housed within a three-tier teak box equipped with a glazed top, a hinged lid, and steel side handles. The black, two-layer dial displays luminous sunk baton indexes, Arabic numerals at the quarters, a subsidiary seconds dial, a linear 52-hour power reserve indicator positioned above the 6 o'clock mark, and a balance lock at 8 o'clock. Powering the chronometer is the Caliber OP XX, a brushed steel movement featuring a fusee and chain mechanism, spring-detent escapement, a cut monometallic compensation balance with cylindrical weights, and a free-sprung helical balance spring.

The Panerai marine chronometer in its teak box with the COSC certificate and a detail view of the Caliber OP XX movement.
The Panerai marine chronometer in its teak box with the COSC certificate and a detail view of the Caliber OP XX movement. — Antiquorum. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
catalog.antiquorum.swiss
Category
Marine chronometer · Marine chronometer
Maker / attribution
Panerai
Reference
OP 6672 PAM 245
Catalogue / lot identifier
124
Source-reported date
2009
Source-reported place
Not established
Source-reported serial
K06/30 (case 1450206)

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

Housing and Exterior

The marine chronometer is contained in a three-tier teak wood box. This wooden structure serves as the primary external housing, featuring a glazed top section that permits viewing of the instrument while the box is closed. The lid is hinged, and the case is fitted with steel handles for transport.

Mounted within this box is the brushed steel bowl. This bowl supports the main chronometer assembly and incorporates a screwed-down bezel. The instrument is gimbaled, allowing it to maintain its position relative to the horizon regardless of the motion of a vessel.

Evidence for this section
  • “Brushed steel bowl with screwed-down bezel, gimbaled in a three-tier teak box, glazed top and hinged lid, steel handles.”

Dial and Timekeeping

The dial is a black, two-layer construction. It utilizes luminous sunk baton indexes for most hour markers, with Arabic numerals used for the quarters. Time is read via black luminous baton hands. An outer track records the minutes.

Functionality includes a subsidiary seconds dial and a linear power reserve indicator located above the 6 o'clock position, capable of displaying up to 52 hours of duration. A balance lock mechanism is integrated into the dial layout at the 8 o'clock position to immobilize the balance during transport.

Evidence for this section
  • “Black with two layer construction, luminous sunk baton indexes and Arabic quarters, outer minute track, subsidiary seconds, linear power reserve above 6, balance lock at 8.”

Movement and Technical Specifications

The Caliber OP XX movement is constructed primarily from brushed steel and is composed of 15 jewels. It employs a traditional fusee and chain mechanism designed for constant force delivery to the escapement. The escapement itself is a spring-detent type, housed within two circular plates.

The timing assembly features a cut monometallic compensation balance equipped with cylindrical weights. It also utilizes a free-sprung helical balance spring with terminal curves, a design intended for high-precision chronometric performance.

Evidence for this section
  • “M. Cal. OP XX, brushed steel, 15 jewels, fusee and chain, spring-detent escapement mounted within two smaller circular plates, cut monometallic compensation balance with cylindrical weights, free-sprung helical balance spring with terminal curves.”

Open research questions

  • What is the intended function of the balance lock mechanism when engaged?
  • Where is the specific location of the maker's mark and serial number engraving on the movement plates?

Source evidence

Recorded claims and source quotations for Panerai Ref. OP 6672 PAM 245 Marine Chronometer
FieldSource-reported valueSource quotation
MakerPanerai“Panerai, No. K06/30”
ReferenceOP 6672 PAM 245“Ref. OP 6672 PAM 245”
Case Number1450206“case No. 1450206”
Limited Edition30 pieces“Made in a limited edition of 30”
MovementCaliber OP XX“M. Cal. OP XX”
Power Reserve52 hours“linear 52-hour power reserve indication”
EscapementSpring-detent“spring-detent escapement”
Sale DateSeptember 26, 2009“sold on September 26, 2009”

Visible details

  • Three-tier teak box construction with finger-jointed corners.
  • Linear power reserve scale located at the bottom half of the dial.
  • Visible balance lock lever positioned near the 8 o'clock marker.
  • Brushed steel bowl with a distinctive circular, gear-toothed bezel profile.

Research qualifications

  • The country of manufacture is not explicitly stated in the source.
  • The source states the movement is 'signed', but specific engraving details on the movement plates are not transcribed.

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

Consulted source

PANERAI REF. OP 6672 PAM 245 MARINE CHRONOMETER Panerai, No. K06/30, case No. 1450206, Ref. OP 6672 PAM 245. Made in a limited edition of 30 and sold on September 26, 2009. Fine and very rare, teak and steel, marine chronometer with linear 52-hour power reserve indication. Accompanied by fitted box, guarantee, instruction booklet, key and COSC certificate.

Reviewed 2026-10-26 · Record ef3683927d

Terms in this record

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

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