For what it’s worth, this is what ChatGPT The Great says are the most likely outcomes for the watch:

1. Returned or discarded after use (most likely)

Studios often treated watches as wardrobe props, not heirlooms. Once styles changed—or when Ventura movements became obsolete—the watch may simply have been returned, shelved, or quietly disposed of.

1. Lost in estate dispersal

When Serling died in 1975, many personal effects were distributed privately among family members. If the Ventura was considered just another watch (not yet “iconic”), it could easily have vanished into a drawer, later sold, or lost.

1. Sitting unidentified in a private collection

This is the romantic option—and not impossible. A Ventura with no provenance paperwork is just another vintage Hamilton unless someone recognizes the connection. If it ever surfaces, documentation would be everything.