Short answer
A replica Jaeger-LeCoultre 1398420 is a counterfeit watch. Jaeger-LeCoultre does not make it, sell it or service it. The digits 1398420 appear in seller listings as a reference number. Current Jaeger-LeCoultre references carry a Q prefix on the maker's own product pages, so a bare 1398420 does not match every published catalogue entry. The number is a seller label. It is not proof that a genuine watch exists under that exact code.
What a reference number is
Swiss watch makers use reference numbers to group watches that share a case, metal, dial and movement. Jaeger-LeCoultre uses a Q prefix on current lines. Older pieces use dotted numeric strings. Formats change across decades. A reference number is not a serial number. The serial is unique to one watch and is engraved on the caseback. Counterfeit sellers reuse one reference across thousands of units, so many buyers report the same digits.
Legal status in the United States
15 U.S.C. 1127 defines a counterfeit mark as a spurious mark that copies a registered trademark. Trafficking in counterfeit goods is a federal felony under 18 U.S.C. 2320. A first offense carries up to 10 years in prison and a $2,000,000 fine for an individual. U.S. Customs and Border Protection can seize shipments and destroy them. The buyer gets no refund and no compensation.
Genuine Jaeger-LeCoultre against a copy
- Movement. Jaeger-LeCoultre builds its own calibers in Le Sentier, Switzerland. Copies use third party or generic movements.
- Case finish. Genuine cases show crisp edges, even brushing and correct lug geometry.
- Dial printing. Text on a genuine dial sits on one plane. Copy dials show thick or uneven print.
- Serial and reference. Both are engraved on the caseback of genuine watches. Copies often repeat one serial.
- Papers and service records. Jaeger-LeCoultre can confirm a watch through its archive and service network.
Claims about replica grades
Sellers use terms such as Swiss made, 1:1 and AAA grade. No standards body defines those terms. No independent lab publishes test data for them. Water resistance, rate and material claims in those listings have no audit trail. Treat them as marketing text.
Risks after purchase
- No manufacturer warranty. Jaeger-LeCoultre declines service on counterfeit watches.
- Parts. No supply of genuine components.
- Resale. A counterfeit watch cannot be sold as genuine. Resale value sits close to zero.
- Customs. Seizure ends the transaction. Some buyers also face civil claims from the brand owner.
How to check a reference
- Find the full reference, including any letter prefix.
- Compare it against the maker's product pages or an authorized dealer.
- Ask for the serial and request a service history.
- Have an independent watchmaker open the case and inspect the movement.
Public sources do not confirm a Jaeger-LeCoultre model sold under the exact code 1398420 without a prefix. If a listing shows that number alone, ask the seller for the full reference and the serial. A seller who cannot supply both is not selling a genuine watch.