Elgin pocket watch dating

18-May-2020 08:10 by 5 Comments

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These were issued to the British military during the Second World War and on into the 1950's.: Swiss made, 13 jewels, electronic balance wheel, circa early 1970's. An awful picture of perhaps the most popular Swiss automatic movement in use today.An early electronic movement featuring transistors and a balance wheel, this looks very similar to the first of its type, the ESA Dynotron 9150, but I can't tell for sure until I check the exact model number stamped under the balance wheel. Versions of this movement appear in watches ranging in price from around 100 to well over 1000.: National Semiconductor LED movement using parts from the USA with module assembly conducted in Thailand.

Note that these scanned images are quite big (circa 3500x2500, 2.5MB) each:: USA made, 360Hz, circa 1965.Some use the term to also describe an instrument used to test watches during repair work. - A lever or pawl with a beak-like shape to engage the ratchet-shaped teeth on a wheel.This lever can be pivoted, and is under tension by a spring.An additional dial is there to record the number of revolutions or minutes counted by the second hand. The English watchmakers, for instance, consider a chronometer to be a portable clock or watch with a detent escapement, although they used the term before detent escapements were developed.In the Swiss and French watchmaking circles, a chronometer is a watch that has been given an official rating certificate by the observatories at Neuchatel or Geneva. - A device capable of measuring small units of time.Ever wonder what that term or description of a watch or clock part means? Here is the most comprehensive list of watch and clock parts, meanings and descriptions that you will find anywhere on the Web.

Feel free to use any of these elsewhere on the web, but only with proper attribution: ADJUSTED ADJUSTABLE POTENCE AFFIX ALL-OR-NOTHING PIECE AMPLITUDE ANTI-MAGNETIC APPLIQUE ARBOR ARC ATTACHMENT AUTOMATIC WATCH AUTOMATON WATCH AUXILIARY COMPENSATION BACK PLATE BALANCE COCK BALANCE SPRING BALANCE STAFF BALANCE BANKING PIN BAR BARREL HANGING BARREL RESTING BARREL (GOING)Beat BARROWS REGULATOR BASSE TATILLE ENAMEL BASSINE BEETLE HAND BEZEL BIMETALLIC BOTTOM PLATE BOWBRIDGE BREGUET BALANCE SPRING BREGUET HANDS BREGUET KEY BREGUET OVERCOIL BREGUET STOP WORK BRISTLE BULLS EYE GLASS BUSH BUTTON WINDING CADRATURE CALIBRE CAM CANISTER CASE CANNON PINION CAP JEWEL CAPPED MOVEMENT CARTOUCHE DIAL CENTRE PINION CENTRE SECONDS CENTRE WHEEL CHAFF CUTTER CHAISE WATCH CHAMPLEVE CHAPTER RING CHASING CHATELAINE CHINESE DUPLEX CHRONOGRAPH CHRONOMETER CHRONOSCOPE CLICK CLOCK WATCH CLOCKMAKERS COMPANY CLOISONNE CLUB FOOT VERGE CLUB TOOTHED LEVER COCK COLLET COLOURED GOLD COMPENSATED BALANCE COMPENSATION CURB COMPLICATED WORK CONICAL PIVOT CONSTANT FORCE ESCAPEMENT CONSULAR CASE CONTRATE WHEEL CONVERSION COQUERET COUNT WHEEL COUNTERPOISE PALLETS CRANK LEVER ESCAPEMENT CRANK ROLLER CRESCENT CROWN WHEEL ESCAPEMENT CURB COMPENSATION CURB PINS CUT BIMETALLIC BALANCE CUVETTE CYLINDER ESCAPEMENT CYLINDER PLUGS DART DEAD BEAT ESCAPEMENT DEAD BEAT VERGE DEAT PIECE DEBAUFRE ESCAPEMENT DECK WATCH DEPTH DETACHED ESCAPEMENT DETENT ESCAPEMENT DETENT DIFFERENTIAL DIAL DIVIDED LIFT DOME DOUBLE ROLLER DOUBLE-BOTTOM CASE DRAW DROP DUMB-REPEATER DUPLEX-ESCAPEMENT DUST-CAP DUTCH FORGERIES EBAUCHE END SHAKE END STONE ENDLESS SCREW ENGINE TURNING ENGLISH LEVER ESCAPEMENT ENTRY PALLET EQUATION OF TIME ESCAPEMENT ESCAPE WHEEL EXIT PALLET FALSE PENDULUM FIGURE PLATE FIVE-MINUTE REPEATER FLAGS FLIRT FLOATING HOUR DIAL FLY FLY-BACK HAND FOB CHAIN FOLIOT FORGERIES FORK FOURTH WHEEL FORM WATCH FOUR-COLOURED GOLD FRAME FREE-SPRUNG FRICTIONAL REST ESCAPEMENT FULL PLATE FUSEE FUSEE CHAIN GADROONING GATE GATHERING PALLET GIMBALS SUSPENSION GOING BARREL GOING FUSEE GOING TRAIN GONGS GRANDE SONNERIE GREAT WHEEL GUARD PIN GUILLOCHE HAIRSPRING HALF PLATE HALF-QUARTER HALLMARK HAND-SETTING HANGING BARREL HEART PIECE HELICAL SPRING HOG’S BRISTLE HOOKE’S LAW HORIZONTAL ESCAPEMENT HORNS HOUR RACK HOUR WHEEL HUNTER IMPULSE IMPULSE ANGLE IMPULSE PALLET IMPULSE PIN INDEPENDENT SECONDS INDEX ISOCHRONOUS JACQUEMART JEWELS JUMP-HOUR JUMPING-HOURS JUMPING-SECONDS KARRUSEL KEYLESS WATCH KEYLESS WINDING LEPINE CALIBRE LEVER ESCAPEMENT LEVER NOTCH LIFT LIGNE LOCK(ING) LOCKING PLATE LUNETTE MAINSPRING MAINTAINING POWER MALTESE CROSS MARINE CHRONOMETER MASSEY LEVER ESCAPEMENT MEAN TIME MIDDLE TEMPERATURE ERROR MINUTE REPEATER MOCK PENDULUM MOON HAND MOTION WORK MOVEMENT MUSICAL WATCH NIELLO NOTCH NUREMBERG EGG OIL SINK OIGNON OPENFACE ORMSKIRK OUTER CASE OVERCOIL PAIR-CASE PALLET PARACHUTE PASSING CRESCENT PASSING SPRING PEDOMETER WATCH PEDOMETER-WIND PENDANT PENDULUM WATCH (DIAL) PERPETUAL CALENDAR PERPETUAL WATCH PILLARS PILLARPLATE PINION PINCHBECK PIN WORK PIQUE PIROUETTE PIVOT PIVOTED DETENT PLATES POISE POKER HAND POSITIONAL ERROR POTENCE POTENCE PLATE POUZAIT ESCAPEMENT PUMP-WIND PULSE-PIECE PURITAN WATCH QUARTER RACK QUARTER REPEATER RACK RACK LEVER ESCAPEMENT RACK STRIKING RATCHET WHEEL RATE RECOIL RECOIL ESCAPEMENT REGULATION REGULATOR REMONTOIRE REMONTOIRE ESCAPEMENT REPEATER REPOUSSE REPUBLICAN CALENDAR RESILIENT ESCAPEMENT ROBIN ESCAPEMENT ROLLER ROSKOPF RUBY CYLINDER ESCAPEMENT RUN-TO-BANKING S BALANCE SAFETY ROLLER SAFETY DART SAVAGE TWO-PIN SAVONNETTE SECONDS PINION SECRET SIGNATURE SECRET SPRING SELF-COMPENSATING SPRING SELF-WINDING SET-UP SHIP’S CHRONOMETER SINGLE ROLLER SIX-HOUR DIAL SKELETON DIAL SKELETONISED MOVEMENT SNAIL SOUSCRIPTION (MONTRE A) SPLIT-SECONDS SPRING BARREL SPRING DETENT STACKFREED STANDING BARREL STOP-WORK STRAIGHT LINE LEVER STRIP COMPENSATION STUD SUGAR TONGS SUN AND MOON DIAL SUPPLEMENTARY ARC SURPRISE PIECE SWEEP SECONDS SWING WHEEL SWISS LEVER ESCAPEMENT TABLE ROLLER TACT TAILLE DOUCE TAMBOUR CASE TANGENT SCREW TEMPERATURE COMPENSATION TERMINAL CURVES THIRD WHEEL THREE-QUARTER PLATE TIMING IN POSITIONS TIMING SCREWS TINTED GOLD TIPSY-KEY TOMPION REGULATOR TOP PLATE TOUCH PINS TOURBILLON TRAIN TRIAL NUMBER TRIPLE-CASED TRIPPING TURKISH MARKET WATCHES TWO-PIN ESCAPEMENT UNDER-DIAL WORK UP-AND-DOWN DIAL VERGE VERGE ESCAPEMENT VIRGULE ESCAPEMENT WANDERING HOUR DIAL WARNING WATCH PAPER WINDING SQUARE WORM WHEEL ADJUSTED.

In this example, two such movements have been housed in a single case to provide a watch with two independently adjustable time zones.

With thanks to Paul Groom for the use if his picture.: Swiss made, 15 jewels, micrometer adjustable balance, circa 1940's.

(Ref: Richard French, "Servicing a Quarter Repeater" - The frequency that the pendulum or balance makes. - A metal object that has either been demagnetised or a metal that does not exhibit a natural tendency to be affected by magnetic fields. - In watch terms an arbor is an axle used for any gear wheel or winding wheel. - The lugs of a watch case that attach to a watch band (United States Patent 4847820 AUTOMATON WATCH.

- Watches that at certain time points, for example when striking hours, have animated figures that move in time with the chime of the watch. - A watch where the mainspring is wound by the action of the movement of the watch when the wearer moves during normal daily activities. - John Sweetman Eiffe first proposed to correct "middle temperature error" by way of an auxiliary compensation device.

It is rare to find a watch with an intact Barrow’s regulator. - Translucent enamel over an engraving; serves to enhance the artistic effect. - A model of watch case with rounded, smooth edges. - A model of hour hand that slightly resembles a stag beetle. The chain was often designed to go along with the decoration on the watch case. After the first tooth of each set passed the roller, the escape wheel locked in position, so a second swing of the balance was needed to unlock the second tooth and let the second hand move forward.

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