Hamilton Broadway Limited pocket watch
The Broadway Limited was first produced in 1893 and quickly gained popularity among employees of the US railroads due to its high level of timekeeping accuracy.
By 1923, just over half of Hamilton’s pocket watch production comprised Railroad Grade watches, consisting of 17 jewels and 42-hour mainsprings.
The American Expeditionary Forces also embraced the timepiece, and adopted it as their official watch.
The watch was also employed by Admiral Byrd on his polar expeditions, as well as Auguste Picard on his pioneering balloon ascents in the 1930s.
The earliest examples can be extremely popular with collectors and change hands for four figures.