Pocket watch illinois dating dial Dating 41056
This is referred to as "pendant-set." A lever-set mechanism requires the user to remove the bezel of the watch and engage a lever to place the watch in setting mode.This tedious process of removing the bezel had a very important purpose; it ensured that the time on the watch was never accidentally changed by catching the winding knob on a pocket or any number of other unintentional situations.At this time both the watch companies and the railroads were hitting their stride in terms of volume and quality.An important part of standard watch regulations included service intervals and testing, but there is also a list of features that almost all railroad watches shared.pulling the crown (winding knob) away from the watch, then pushing the crown back towards the watch to return to winding mode.We are focused on restoring and preserving some of the most famous railroad watches of all time such as the Hamilton 992B, Ball 999B, Illinois Bunn Special, Elgin B.
Mechanically speaking, almost all 1900’s railroad watches shared a number of performance and reliability enhancing features.Most had a fixed regulator to avoid timekeeping variation from impact (A), a double roller balance wheel to avoid going out of action (often called overbanking) (B), 19 or more jewels to reduce friction and increase consistency of the gear train (C), timekeeping adjustment in 5 or more positions to make sure the watch kept accurate time regardless of orientation (D), and adjustment for temperature to ensure accuracy in a variety of climates (E).Many railroad watches had solid gold or gold plated gear trains (F) and jewel settings (G) to reduce the effects of magnetism as well as reduce tarnishing, and later watches had features such as magnetically resistant balance wheels, Elinvar hairsprings, adjustments for isochronism, and advanced cap jewel covers (H).And, contrary to common belief, there were many regulations in place before Webb C.Ball was commissioned by railroad officials in the 1890’s to create an overarching set of railroad watch qualifiers.
Some of the highest end railroad watches featured what was referred to as an up-down wind indicator.