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    What Do the Letters Stand for in Patek Philippe Reference Numbers?

    Have you ever noticed that Patek Philippe reference numbers and caliber numbers also include letters? If you’re not sure what the letters in these alphanumeric codes mean, read our handy guide to deciphering the letters in Patek Philippe reference and caliber numbers to find out more.

    Brush Up On Your French To Understand Patek Parlance

    Patek Philippe is based in Geneva, which is in the French-speaking part of Switzerland.

    As such, the letters in Patek Philippe reference numbers and movement codes are abbreviations of French words (the same goes for Rolex).

    The letters in Patek Philippe reference numbers signify the case material of the watch.

     

    J

    • French Word: Jaune
    • English Translation: Yellow
    • Case Material: Yellow gold

    G

    • French Word: Gris
    • English Translation: Gray
    • Case Material: White gold

    R

    • French Word: Rose
    • English Translation: Pink
    • Case Material: Pink gold

    A

    • French Word: Acier
    • English Translation: Steel
    • Case Material: Stainless steel

    P

    • French Word: Platine
    • English Translation: Platinum
    • Case Material: Platinum

    T

    • French Word: Titane
    • English Translation: Titanium
    • Case Material: Titanium

    On the other hand, the letters in Patek Philippe caliber numbers signify the complications and functions of the movement.

    10J

    • French Word(s): 10 jours
    • Complication/Function (in English): 10-day power reserve

    24H

    • French Word(s): 24 heures
    • Complication/Function (in English): 24-hour dial

    AL

    • French Word(s): Alarme
    • Complication/Function (in English): Alarm

    C

    • French Word(s): Calendrier
    • Complication/Function (in English): Date indicator

    CH

    • French Word(s): Chronographe
    • Complication/Function (in English): Chronograph

    CHR

    • French Word(s): Chronographe à rattrapante
    • Complication/Function (in English): Split seconds chronograph

    CL

    • French Word(s): Ciel
    • Complication/Function (in English): Sky Chart

    EQ

    • French Word(s): Equation du temps
    • Complication/Function (in English): Equation of time

    FUS

    • French Word(s): Fuseau horaire
    • Complication/Function (in English): Dual time zone

    HG

    • French Word(s): Heure à guichet
    • Complication/Function (in English): Hour shown via an aperture

    HS

    • French Word(s): Heure sautante
    • Complication/Function (in English): Jumping hours

    HU

    • French Word(s): Heure universelle
    • Complication/Function (in English): World time

    IRM

    • French Word(s): Indicateur de Réserve de Marche
    • Complication/Function (in English): Power reserve indicator

    J

    • French Word(s): Jour
    • Complication/Function (in English): Day indicator

    LU

    • French Word(s): Phases de lune
    • Complication/Function (in English): Moon phases

    PS

    • French Word(s): Petite seconde
    • Complication/Function (in English): Small seconds

    Q

    • French Word(s): Quantième perpétuel
    • Complication/Function (in English): Perpetual calendar

    QA

    • French Word(s): Quantième annuel
    • Complication/Function (in English): Annual calendar

    QR

    • French Word(s): Quantième perpétuel rétrograde
    • Complication/Function (in English): Perpetual calendar with retrograde date hand

    R

    • French Word(s): Répétition minutes
    • Complication/Function (in English): Minute repeater

    REG

    • French Word(s): Affichage de Type Régulateur
    • Complication/Function (in English): Regulator-style display

    S

    • French Word(s): Seconde au centre
    • Complication/Function (in English): Center sweep second hand

    SE

    • French Word(s): Semaine
    • Complication/Function (in English): Week indicator

    SQU

    • French Word(s): Squelette
    • Complication/Function (in English): Skeleton

    SID

    • French Word(s): Heure sidérale
    • Complication/Function (in English): Sidereal time

    TO

    • French Word(s): Tourbillon
    • Complication/Function (in English): Tourbillon

    Have you ever noticed that Patek Philippe reference numbers and caliber numbers also include letters? If you’re not sure what the letters in these alphanumeric codes mean, read our handy guide to deciphering the letters in Patek Philippe reference and caliber numbers to find out more.

    Brush Up On Your French To Understand Patek Parlance

    Patek Philippe is based in Geneva, which is in the French-speaking part of Switzerland.

    As such, the letters in Patek Philippe reference numbers and movement codes are abbreviations of French words (the same goes for Rolex).

    The letters in Patek Philippe reference numbers signify the case material of the watch.

     

    J

    • French Word: Jaune
    • English Translation: Yellow
    • Case Material: Yellow gold

    G

    • French Word: Gris
    • English Translation: Gray
    • Case Material: White gold

    R

    • French Word: Rose
    • English Translation: Pink
    • Case Material: Pink gold

    A

    • French Word: Acier
    • English Translation: Steel
    • Case Material: Stainless steel

    P

    • French Word: Platine
    • English Translation: Platinum
    • Case Material: Platinum

    T

    • French Word: Titane
    • English Translation: Titanium
    • Case Material: Titanium

    On the other hand, the letters in Patek Philippe caliber numbers signify the complications and functions of the movement.

    10J

    • French Word(s): 10 jours
    • Complication/Function (in English): 10-day power reserve

    24H

    • French Word(s): 24 heures
    • Complication/Function (in English): 24-hour dial

    AL

    • French Word(s): Alarme
    • Complication/Function (in English): Alarm

    C

    • French Word(s): Calendrier
    • Complication/Function (in English): Date indicator

    CH

    • French Word(s): Chronographe
    • Complication/Function (in English): Chronograph

    CHR

    • French Word(s): Chronographe à rattrapante
    • Complication/Function (in English): Split seconds chronograph

    CL

    • French Word(s): Ciel
    • Complication/Function (in English): Sky Chart

    EQ

    • French Word(s): Equation du temps
    • Complication/Function (in English): Equation of time

    FUS

    • French Word(s): Fuseau horaire
    • Complication/Function (in English): Dual time zone

    HG

    • French Word(s): Heure à guichet
    • Complication/Function (in English): Hour shown via an aperture

    HS

    • French Word(s): Heure sautante
    • Complication/Function (in English): Jumping hours

    HU

    • French Word(s): Heure universelle
    • Complication/Function (in English): World time

    IRM

    • French Word(s): Indicateur de Réserve de Marche
    • Complication/Function (in English): Power reserve indicator

    J

    • French Word(s): Jour
    • Complication/Function (in English): Day indicator

    LU

    • French Word(s): Phases de lune
    • Complication/Function (in English): Moon phases

    PS

    • French Word(s): Petite seconde
    • Complication/Function (in English): Small seconds

    Q

    • French Word(s): Quantième perpétuel
    • Complication/Function (in English): Perpetual calendar

    QA

    • French Word(s): Quantième annuel
    • Complication/Function (in English): Annual calendar

    QR

    • French Word(s): Quantième perpétuel rétrograde
    • Complication/Function (in English): Perpetual calendar with retrograde date hand

    R

    • French Word(s): Répétition minutes
    • Complication/Function (in English): Minute repeater

    REG

    • French Word(s): Affichage de Type Régulateur
    • Complication/Function (in English): Regulator-style display

    S

    • French Word(s): Seconde au centre
    • Complication/Function (in English): Center sweep second hand

    SE

    • French Word(s): Semaine
    • Complication/Function (in English): Week indicator

    SQU

    • French Word(s): Squelette
    • Complication/Function (in English): Skeleton

    SID

    • French Word(s): Heure sidérale
    • Complication/Function (in English): Sidereal time

    TO

    • French Word(s): Tourbillon
    • Complication/Function (in English): Tourbillon

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