23-Jewel New Railway Hampden Railroad Pocket Watch
U.S.; Hampton; Man’s; Serial # 3,039,005; CA1912
CASE: The yellow gold-filled 18-size (50-55MM) open face case displays floral/machined decorations and is monogrammed.
DIAL: This white porcelain dial features Arabic numerals and spade hands.
MOVT: The 23-jewel lever-set nickel movement has a lever escapement, full plate layout and is signed.
CONDITIONS:
C 3-16 (The case is in very good condition, worn)
D 2 (The dial is in perfect condition)
M 3 (The movement is in very good condition) AI-RR22016-5
Jewel Count
Jewels are used as bearings to reduce metal-to-metal contacts which produce friction and wear. They improve the performance and accuracy of the watch and materially proglong its usefulness. The materials used for making watch jewels are diamonds, sapphires, rubies and garnets. The diamond is the hardest but is seldom used except for cap jewels. The sapphire is the next hardness and is the most commonly used because of its fine texture. Garnets are softer than than sapphires and rubies.
Stem-wind, Lever-Set Movements
Mandatory for all railroad watches after roughly 1908, this kind of pocket watch was set by opening the crystal and bezel and pulling out the setting-lever (most hunter cases have levers accessible without removing the crystal or bezel), which was generally found at either the 10 or 2 o\'clock positions on open-faced watches, and at 5:00 on hunting cased watches. Once the lever was pulled out, the crown could be turned to set the time. The lever was then pushed back in and the crystal and bezel were closed over the dial again. This method of time setting on pocket watches was preferred by American and Canadian railroads, as lever setting watches make accidental time changes impossible. After 1908, lever setting was generally required for new watches entering service on American railroads.
Lever Escapement
An escapement is a device in mechanical watches and clocks that transfers energy to the timekeeping element (the \"impulse action\") and allows the number of its oscillations to be counted (the \"locking action\"). The impulse action transfers energy to the clock\'s timekeeping element (usually a pendulum or balance wheel) to replace the energy lost to friction during its cycle and keep the timekeeper oscillating. The escapement is driven by force from a coiled spring or a suspended weight, transmitted through the timepiece\'s gear train. Each swing of the pendulum or balance wheel releases a tooth of the escapement\'s escape wheel gear, allowing the clock\'s gear train to advance or \"escape\" by a fixed amount. This regular periodic advancement moves the clock\'s hands forward at a steady rate. At the same time the tooth gives the timekeeping element a push, before another tooth catches on the escapement\'s pallet, returning the escapement to its \"locked\" state. The sudden stopping of the escapement\'s tooth is what generates the characteristic \"ticking\" sound heard in operating mechanical clocks and watches.
Plates
The movement of a watch has two plates and the works are sandwiched inbetween. The plates are called the top plate and the pillar plate.
Full Plate Layout
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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