A TACT WATCH

1 REPEATER WATCH (SEE COMPLICATION) IN WHICH HAMMER AND BELL ARE REPLACED BY A SHARP PIN WHICH PROTRUDES FROM THE CASE TO PRICK THE FINGER ONCE FOR EACH HOUR.
2 A TYPE OF WATCH MADE AFTER 1795 BY ABRAHAM LOUIS BREGUET TO GIVE TIME BY TOUCH. IN THE LATE EIGHTEENTH CENTURY IT WAS CONSIDERED IMPOLITE TO CONSULT ONE’S WATCH IN COMPANY, A QUESTION OF ETIQUETTE WHICH THE À TACT WATCH HELPED TO SOLVE (THE FRENCH TACT, MEANING TOUCH, HAS GIVEN THE ENGLISH TACT AND TACTFUL). KNOBS REPRESENTING THE HOURS ARE POSITIONED AROUND THE CASE WITH A LARGE HAND THAT COULD BE TURNED UNTIL IT MET RESISTANCE. ITS POSITION IN RELATION TO THE KNOBS GAVE THE TIME. THIS KIND OF TACTILE WATCH IS NOW MAINLY USED BY THE BLIND AND VISUALLY IMPAIRED.

AGATE

A VARIETY OF THE QUARTZ GROUP THAT EXISTS IN MANY DIFFERENT COLOURS AND IS OPAQUE. THIS ORNAMENTAL GEMSTONE IS SOMETIMES USED FOR WATCH DIALS.

AGE OF THE MOON

THE TIME BETWEEN SUCCESSIVE NEW MOONS, SHOWN ON A WATCH DIAL FROM 1 TO 29½ DAYS, CORRESPONDING TO THE PERIOD OF LUNAR REVOLUTION AROUND THE EARTH.

ALARM

A POCKET WATCH, WRISTWATCH OR CLOCK THAT AUTOMATICALLY SOUNDS AT A PRESET TIME. THE ALARM FUNCTION REGAINED IN POPULARITY WITH THE LAUNCH, BY ETERNA IN 1908, OF A WRISTWATCH WITH ALARM.

AMPLITUDE

THE DISTANCE BETWEEN THE TWO EXTREME POINTS OF A MOVEMENT OR PERIODIC PHENOMENON (A ANGLE).

ANALOGUE

AN ANALOGUE WATCH DISPLAYS TIME BY MEANS OF HANDS AND A DIAL (AS OPPOSED TO DIGITAL OR ALPHANUMERICAL).

APERTURE

A SMALL OPENING IN THE DIAL.
IN AN APERTURE WATCH, VARIOUS INDICATIONS SUCH AS THE MONTH, MOON PHASE, DAY, DATE, HOUR, MINUTE, ETC. ARE VISIBLE THROUGH THESE OPENINGS.
A SMALL OPENING IN THE DIAL.
IN AN APERTURE WATCH, VARIOUS INDICATIONS SUCH AS THE MONTH, MOON PHASE, DAY, DATE, HOUR, MINUTE, ETC. ARE VISIBLE THROUGH THESE OPENINGS.

APPLIED CHAPTER

THE HOUR NUMERALS OR DECORATIONS THAT ARE CUT FROM SHEETS OF METAL THEN AFFIXED TO THE DIAL.

ARABIC NUMERALS

1, 2, 3, ETC. ARABIC NUMERALS, WHICH WERE WIDELY USED ON WATCH DIALS TOWARDS THE EIGHTEENTH CENTURY, ALLOW GREATER SCOPE FOR FANTASY THAN THEIR ROMAN COUNTERPARTS. THE MAJORITY OF FINE-QUALITY WATCH COMPANIES USE BOTH ARABIC AND ROMAN NUMERALS WITHOUT DISTINCTION.

ASSORTIMENT

FRENCH TERM FOR THE THREE PARTS OF THE ESCAPEMENT (ESCAPE-WHEEL, LEVER AND ROLLER).
GENERALLY, SPECIALIST COMPANIES SUPPLY WATCHMAKERS WITH THE LEVER ASSORTMENT.

BACK

IN A WATCH CASE, THE COVER, TRANSPARENT OR NOT, OPPOSITE THE DIAL.

BAGUETTE

THE CUT OF A GEMSTONE STONE THAT HAS BEEN CUT INTO A LONG, RECTANGULAR SHAPE. THE WORD BAGUETTE MEANS “STICK” OR “ROD” IN FRENCH.