Reverso engravable reverse face

Probable

The solid face that the Reverso presents when turned. It has been engraved, enamelled and set to order since the 1930s, and JLC continues to offer personalisation — so a decorated reverse is a normal configuration on this model rather than an aftermarket modification.

Part reference

Brand: Jaeger-LeCoultre
Material: Steel, gold or platinum to match the case
Identifying marks: Factory and period engraving is cut with even depth and consistent letterform. Enamel work is a specialist commission and should be documented; JLC's heritage department is the route to establishing one.

Documented variations

Classification

FactoryDocumented as shipped from the factory for this reference and period.PeriodNot original to this watch, but correct for its production period.ServiceFitted by the manufacturer's own service network. Not a defect.AftermarketThird-party part. Affects originality, not authenticity.ModifiedGenuine parts in a configuration the factory did not sell. Affects originality and value, not authenticity.CounterfeitDeceptive reproduction intended to pass as genuine.UnknownEvidence on file does not settle the question.

Owner or period engraving
AftermarketProbable
Whole production
Expected on this model in a way it is not on any other in this catalog — the surface exists to be engraved. It affects value, usually downward for a monogram and upward for a documented commission, and it is emphatically not a counterfeit indicator.
Later-added decoration presented as period
UnknownProbable
Whole production
Because decorated Reversos command premiums, adding engraving or enamel to a plain case is economically rational. Assess the work's cutting or firing against the period claimed, and treat an undocumented attribution as unverified rather than as either genuine or added.

Open questions

OpenAttributionMedium

Establishing period engraving and enamel on a Reverso reverse face

Can factory or period decoration on a Reverso's reverse face be distinguished from later work, and does JLC's heritage department hold records of commissioned decoration?

Scope Decorated Reversos command premiums and the surface exists to be decorated, which makes later addition both easy and rational. The catalog classifies undocumented decoration as unknown rather than as either period or added — the honest position, and an unsatisfying one for anyone valuing a watch.

Documented on these references

Jaeger-LeCoultre Q2548440Factory
Whole production
Engraving on this face is a normal configuration, not a modification. The surface exists for it.
Jaeger-LeCoultre Q3978480Factory
Whole production

Provenance of this record

Sources & Evidence

Secondary sourceCollector research

Jaeger-LeCoultre collector research on Reverso generations and caliber supply

Collector communities and specialist dealers

Accessed: 2026-08-18

Cited for

This referenceProbable

Primary sourceManufacturer archive

Jaeger-LeCoultre heritage department and archive

Jaeger-LeCoultre, Le Sentier

Accessed: 2026-08-18