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The Encyclopedia of Horology

Wristwatch · Tank wristwatch

Cartier Tank Louis Extra Platte

Partially verified

This Cartier Tank Louis, known as the 'Extra Platte' or 'Extra-Slim', dates to the 1960s and features an 18k yellow gold case measuring 30 x 23 mm. The watch is powered by an ultra-thin manual wind Jaeger-LeCoultre movement. The dial is white with painted black Roman numerals and a railroad-style minute track, paired with blued hands. A blue cabochon-topped winder is set into the side of the case. The watch is presented on its original leather strap and includes an original 18k gold folding clasp, which is engraved with inventory numbers. The auction description reports the watch has been serviced by their watchmaker. The serial number 516xx corresponds to the 1960s manufacture date.

Front view of the Cartier Tank Louis Extra Platte with original leather strap.
Front view of the Cartier Tank Louis Extra Platte with original leather strap. — Bulang & Sons. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
www.bulangandsons.com
Category
Wristwatch · Tank wristwatch
Maker / attribution
Cartier
Reference
Not recorded
Catalogue / lot identifier
Source URL identifies the listing
Source-reported date
1960s
Source-reported place
France
Source-reported serial
516xx

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 and Dial

The watch features a rectangular 18k yellow gold case measuring 30 x 23 mm. The case design is characterized by its slim profile, aligning with the 'Extra-Plate' designation of the model. The winding crown is fitted with a blue cabochon, a consistent design feature for the model as stated in the source.

The white dial displays painted black Roman numerals and a railroad-style minute track. Notably, the dial lacks a 'PARIS' signature, a condition the auction description indicates is accurate for the mid-1960s production era. Blued hands indicate the hours and minutes.

Evidence for this section
  • “18k Yellow gold case 30 x 23 mm”
  • “The dial is not signed PARIS, as is correct for that mid 1960s period.”
  • “Rare blue cabochon-topped winder”

Movement and Components

The timepiece is driven by a Jaeger-LeCoultre ultra-thin manual wind movement. The auction description reports that this movement has undergone a full service by their watchmaker to ensure operational condition.

The watch is fitted with an original Cartier leather strap and an original 18k gold folding clasp. This clasp is marked with Cartier inventory numbers, indicating its original affiliation with the watch.

Evidence for this section
  • “Jaeger-LeCoultre ultra-thin manual wind movement”
  • “The Jaeger-LeCoultre movement has been fully serviced by our watchmaker”
  • “original Cartier Paris 18k gold folding clasp, which carries the Cartier inventory numbers.”

Provenance and Marks

The watch is assigned the serial number 516xx, which the provided specifications link to production in the 1960s.

The auction description reports that both the dial and the case are in very good condition.

Evidence for this section
  • “516xx Serial dates to the 1960s”
  • “Both the dial and case are in very good condition.”
  • “Cartier’s production in the 1960s was highly limited, typically not exceeding 1,000 watches annually.”

Open research questions

  • Can the exact year of manufacture be determined from the full, unredacted serial number?
  • What are the precise historical production records for the 516xx serial range within the Cartier archives?

Source evidence

Recorded claims and source quotations for Cartier Tank Louis Extra Platte
FieldSource-reported valueSource quotation
Case Material18k yellow gold“18k Yellow gold case”
Movement ManufacturerJaeger-LeCoultre“Jaeger-LeCoultre ultra-thin manual wind movement”
Dial SignatureCartier“The dial is not signed PARIS, as is correct for that mid 1960s period.”
Serial Number516xx“516xx Serial dates to the 1960s”
Case Dimensions30 x 23 mm“18k Yellow gold case 30 x 23 mm”
Clasp18k gold folding clasp“original Cartier Paris 18k gold folding clasp, which carries the Cartier inventory numbers.”

Visible details

  • Blued hands
  • Railroad-style minute track on dial
  • Case back features serial number engraving
  • Blue cabochon-topped crown

Research qualifications

  • Exact year of production within the 1960s is not specified
  • Serial number is partially obscured in the photographic record

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

Consulted source

ساعت مچی Cartier Tank Louis Extra Platte از طلای زرد ۱۸ عیار دهه ۱۹۶۰

Reviewed 2026-11-02 · Record 546a64e1bf

Terms in this record

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

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