Accuracy of railroad watches is a fascinating subject in itself: "a technology program that would require a level of innovative engineering that would not be se

Accuracy of railroad watches is a fascinating subject in itself: "a technology program that would require a level of innovative engineering that would not be seen again until the moon landings", to quote this excellent article: http://everything2.com/title/Antique+railroad+pocket+watches http://everything2.com/title/Antique+railroad+pocket+watches