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18K Gold Quarter Hour Pump Repeater Early Verge Pocket Watch Antique from 1830

Estimated price for orientation: 3 300 $

Category: Antique
Class:











Description
Material: Yellow Gold Serial Number: 1,439
Closure: Open Face Country Made: Switzerland
Features: Quarter Hour Repeater, 12-hour Dial, Keywind/Keyset, Includes Key Age: Antique (pre 1920)
Movement: Mechanical: Hand-winding Case Material: Yellow Gold


18K Gold ¼ Hr. Pump Repeater Early Verge Man’s Open Face Pocket Watch in Exceptional Condition
Swiss; Man’s; Serial #1,439; Circa: 1830
CASE: The 18K yellow gold 18-size case features an open face, machined decorations, and is signed “HB.”
DIAL: This white porcelain dial displays Roman numerals and has spade hands.
MOVT: This key-set #1,439 movement with verge fusee escapement is gilt with a full plate layout.
C  3 (The case is in very good condition.)
D  2 (The dial is in perfect condition.)
M  3 (The movement is in very good condition.)
R  8.5 (Rarity on a scale of #1 being very common to #10 being extremely rare.)
Experts Opinion: Great sound, clean in every respect, comes with keys.
AI-CAT168-38
Pump Quarter Hour Repeater
The repeater is set in motion by depressing the pump in the stem of the pocket watch, when the safety slide is switched off. The quarter repeater strikes the number of hours, and then the number of quarter hours since the last hour.  The mechanism uses 2 chimes of different tones.  The low tone usually signals the hours, and the high tone the quarter hours.  As an example, if the time is 2:45, the quarter repeater sounds 2 low tones and after a short pause 3 high ones: "dong, dong, ding, ding, ding".  Alternatively, some use a pair of tones to distinguish the quarter hours: "dong, dong, ding-dong, ding-dong, ding-dong".
Key-wind/Key-set Movements
The very first pocket watches up until the third quarter of the 19th century had key-wind and key-set movements.  A watch key was necessary to wind the watch and to set the time.  This was usually done by opening the case back and putting the key over the winding-arbor (which was set over the watch's winding-wheel, to wind the mainspring) or by putting the key onto the setting-arbor, which was connected with the minute-wheel and turned the hands.  Some watches of this period had the setting-arbor at the front of the watch, so that removing the crystal and bezel was necessary to set the time. 
Verge Fusee Escapement
Used in antique spring-powered mechanical watches and clocks, a fusee is a cone-shaped pulley with a helical groove around it, wound with a cord or chain which is attached to the mainspring barrel. Fusees were used from the 15th century to the early 20th century to improve timekeeping by equalizing the uneven pull of the mainspring as it ran down. The mainspring is coiled around a stationary axle (arbor), inside a cylindrical box, the barrel. The force of the spring turns the barrel.
Full Plate
A plate (or disc) that covers the works and supports the wheels pivots. There is a top plate, a bottom plate, half, and 3/4 plate. The top plate has the balance resting on it.
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