21 Jewel Illinois Bunn Special Railroad Pocket Watch with 60 Hour Movement

21 Jewel Illinois Bunn Special Railroad Pocket Watch with 60 Hour Movement

21 Jewel Illinois Bunn Special Railroad Pocket Watch with 60 Hour Movement

21 Jewel Illinois Bunn Special Railroad Pocket Watch with 60 Hour Movement


1 available for immediate delivery

Product Details

Illinois 21-Jewel Super Clean Railroad Pocket Watch “Bunn Special” with marked “Sixty Hour” Movement in White Gold-Filled Case
U.S.; Illinois; Man’s; Serial# 5,132,219; C. 1928
CASE: The white gold-filled, 16-size, plain polished case has an open face and is signed “Bunn Special Model – Wadsworth”.
DIAL: This white porcelain, double sunk, Montgomery style dial displays Arabic hour numerals, Arabic minute track with red 5-minute numerals, subsidiary seconds dial and has spade hands.
MOVT: This 21-jewel, lever-set movement with lever escapement is nickel with a ¾ plate layout and is signed “Sixty Hour Bunn Special 21-Jewels”. Marked “Sixty Hour Bunn Special Illinois Watch Co. Springfield, Adjusted Temperature & Six Positions, Double Roller, Motor Barrel 21 Jewels, 5132219”.
C 3 (The case is in very good condition)
D 3-44 (The dial is in very good condition, two hairlines)
M 3-9 (The movement is in very good condition, slightly scratched)

Montgomery Dial
About 1904 the Montgomery dials began to appear on some RR watches. The distinguishing feature of the
Montgomery dial is that each minute is numbered around the hour chapter. The five-minute divisions are in red, and
the true Montgomery dial has the number "6" inside the minute register. These dials are favored by the railroad men.

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.

Watch adjustment is the process of correcting those errors in the watch that cause variation in time keeping. These include temperature influences, variation in driving power and position of the watch with respect to mechanism such as pendant up or dial up.

Watches with better calibre movements will have been adjusted at the factory for a number of positions. The usual array of positions include a subset of the following positions:
1. Dial up 2. Dial down 3. Bow up 4. Bow down (Not required by Railroad) 5. Bow left 6. Bow right

These positional adjustments are intended to insure that the watch is just as reliable and accurate regardless of the position in which it is stored or used.

In addition to positional adjustments, the watch may also be adjusted for Temperature(heat/cold). Temperature affects different elements in different ways. Heat will cause some metals to expand faster than others, and cold may cause some metals to contract more than others. A watch that is adjusted to temperatures will usually include some combination of metals that allow the watch to maintain its proper functionality within a larger range of temperatures than one that is not adjusted for temperature.

The general rule of thumb with adjustments is that more is better. However, for average every day use, a typical unadjusted watch was perfectly adequate.