Antique 16s Keystone Hamilton Open Face Railroad Pocket Watch Case Engraved USA. Item: Pocket Watch Case. Case Material: 10k GF. Inside Diameter: 43.5mm. Overall Condition: Fair, overall condition for its age. Case: There is plating wear through and scratches on the case. Crystal: There are scratches on the crystal. Crown: The crown is worn. Additional Information: The bow is not original.