I have a pattern of Molnija pocket watch sailboat, which says Discovery Day.

Your Molnija pocket watch has the words Columbus Discovery Day, which may be related to Puerto Rico. A major festival in Puerto Rico is Discovery Day, which commemorates the day when Columbus discovered Puerto Rico in 1493. This festival is held in 10 every year. On this day, schools and communities will hold various activities to celebrate.

The pattern of your pocket watch may be designed to commemorate this festival. In addition, Molnija is a famous Russian watch manufacturer, and their high-precision and high-reliability navigation clocks and pocket watches have been widely used in history.

If you need more information about pocket watches or make a more accurate evaluation of their value, it is recommended to consult a professional watch appraisal agency or auction house.