A gold case marked 14K, 18K, or 750 with the stamp on the inside back cover of ... Carefully open the back cover of the pocket watch to find the serial number engraved into the movement.

The auction for John Jacob Astor IV's 14-carat gold Waltham pocket watch was sold to an American buyer. The watch, engraved with the initials JJA, was found with Astor's body when it was recovered ...