The movement is a Hamilton 999B Model 21J ruby jewel adjusted to 5 positions for better timekeeping. It is running very strong and keeping great time.The yellow gold filled Ball signed case is in great condition with an engraved back cover. The case front and back screws on easily on this watch. Definitely a very lightly worn watch. The Ball signed porcelain dial is flawless. The crystal is in great condition with no chips or scratches. The serial number of this watch put it at a manufacture date around 1946. This is a stem wind, lever set pocket watch. A great gift for the watch or railroad collector! The item "HAMILTON 999B BALL OFFICIAL RAILROAD STANDARD 21J RAILROAD POCKET WATCH 1946" is in sale since Saturday, June 17, 2017. This item is in the category "Jewelry & Watches\Watches, Parts & Accessories\Pocket Watches\Antique". The seller is "watches222" and is located in Chesterfield, Missouri. This item can be shipped to United States.