Thank you for viewing. This is an antique Omega Seamaster wristwatch. While the details of the crown are unknown, the strap holders and the crystal are also original. (Although difficult to see, the Omega logo is in the center of the last photo.) It was sent for repair about two years ago, and the date, hour hand, minute hand, and second hand can all be adjusted, but it currently has a dead battery, so please have the battery replaced after purchase. The strap is a standard replacement strap, so please replace it with one that suits your taste.