Antique Elgin Atlas 14 K Gold Victory Hunter Case Side Wind Working Pocket Watch
The watch is working, it was wound and ran for several hours.  The crystal is missing.
The serial number is 7159777 which dates the watch to 1898
The movement is marked Atlas Watch Co. Chicago USA
The case is a full hunter and has a floral design.  The inside of the back cover has an American flag and is marked Victory 14 K.  The inner back cover has a crown and the number 659986.
The watch measures about 41 mm across.
I do not know the weight of the case alone.