This is a Ball Hamilton 18 size, open face, stem wind, lever set, 17 jewels, adjusted, marked OFFICIAL RR STANDARD. Run watch- see Shugart & Gilbert book-2 star rarity watch.The movement is in very good condition and runs. It has not been cleaned or serviced, so I cannot guarantee it to be perfectly reliable. The porcelain dial is original, and in very good condition with some surface scratches.
Looks like it may have a coupe of very light faint hairlines that are difficult to see as well. The case is a 10 year gold filled case by Keystone. It has a horse on back.The case is not original to the movement. It is in good overall condition with clear designs, and some edge brassing. The item "Early Ball 18S Pocket Watch 17j Hamilton Grade 999 RARE Third Run (2 Stars)" is in sale since Friday, March 6, 2020. This item is in the category "Jewelry & Watches\Watches, Parts & Accessories\Pocket Watches\Antique".
The seller is "bobgl" and is located in Winnetka, Illinois. This item can be shipped worldwide.