#Hamilton pocket watch serial numbers movie#

The little weights on the balance wheel are an important part of that adjustment. Position adjustment refers to the mechanical design of the balance wheel and the hairspring. The watch runs about 52 hours when fully woundД«alance wheel: Aurium, a monometallic beryllium-silver-nickel alloy, Aurium is a Hamilton marketing term (trademarked in April 1940 by Hamilton), the exact composition of the alloy was kept secret.ДЄdjustement: temperature, isochronism and 6 positions Rate: 2.5Hz, 5 beats per second, 18000 bph (beats per hour) Jewels (gemstone bearings): 21, friction set, all upper jewel settings are gold Movement size: 16, 1.700 inches, 43.18 mm diameterДЄpproximate watch size (depends on case): 2 inch (5cm) diameter, weight 90g It has a beautifully decorated movement.ДЄ 1948 Hamilton Railway Special, grade 992B, 21J The Hamilton 992B pocket watch is a beautiful watch not only on the outside. In this article we focus however on watches and it is this focus on timing only that lead to those beautiful and precise American railroad watches. Ball January 16, 1910).ДЄn interesting question from a historic point of view is of course: why did nobody in North America come up with any solution other than time keeping? Many other countries solved the root cause of the problem with station to station communication, signaling, tokens or dual track. He gave a very interessting interview in the New-York Tribune Janu( Many lives sacrificed because of faulty watches, interview with Webb C. Ball's career eventually led to him being the time inspector on more than half the United States' railways, leading to a far more uniform set of standards across the US. His first job as a time inspector was when he was brought in by the Lake Shore and Michigan Southern Railways in 1891 after a crash and was tasked with bringing their time inspection system up to industry standards. These railways had a single track for both directions and two trains running in opposite direction could pass each other at railway stations and other places which had two tracks, one for each direction, for a short distance only.ДЄ notable watch inspector was Webb C. Regular watch inspection and consistent time keeping was the only thing that kept trains from running into each other on Americas single track railways. The need for Railroad Watches to be 'railroad approved' stemmed from a number of train accidents in the late 1800's where two trains collided head on due to poor time keeping. A lot of other mechanical watches are off that much in just one day. Then you will achieve about +/-В 15sec accuracy Is exposed to different temperatures and shaken or turned A well maintained and adjusted watch kept inДЄ fixed location at room temperature can reach accuracies The Hamilton grade 992B is a high quality antique mechanical pocket watch. The Hamilton 992B Railroad Pocket Watch, Hamilton Railway Special This fine timepiece displays beautifully and would make an excellent addition to any collection or as a treasured family heirloom.Hamilton 992B Railroad Pocket Watch, Hamilton Railway Special The case features a trim sleek design that would become the hallmark of American style on the threshold of the Space Age. Its open face movement features 17 jewels, a nickel finish, and adjusted to three positions. The visual aesthetics of this watch are further enhanced by its size 10 movement and come together to reflect a timepiece of history reflecting the changing trends of the mid 20th century. This Hamilton Grade 917вЂ™s dial shows beautifully with late art deco period raised Arabic numerals highlighted by modern style gold-trimmed hands.

Today, Bakelite products have become attractive collectorвЂ™s items for BakeliteвЂ™s вЂњretroвЂќ appeal. Bakelite was the first plastic ever produced using synthetic components.

The Bakelite box itself is of historical interest. This pocket watch is in excellent condition and comes with its original Bakelite box and an outer cardboard box with matching serial numbers.

#Hamilton pocket watch serial numbers movie#

This vintage Hamilton Grade 917 Model 1 was produced in 1951 when gas was 19 cents a gallon, electricity was produced using nuclear power for the first time, and movie theaters began experimenting with 3-D movies.