Vintage Railway Timekeeper Swiss made pocket watch - good working order

Vintage Railway Timekeeper Swiss made pocket watch - good working order. I have not been able to find definitive information about the watch - the man who serviced the watch thinks it is late 19th Century and another article puts it c1950. In any case, the watch has "Railway Timekeeper, Shockproof, Specially Examined and Swiss Made" on the face along with a steamtrain. It also has an engraving of a steamtrain on the back. The watch is 4.5cm in diameter. It is in great working condition and keeps time perfectly - I have just had it serviced. Sadly, it has some wear and scratching to the chrome on the back and on the sides. However, I suppose this could be expected due to its age, no matter which dating is correct. A truly lovely piece of history.