This is a classic Westclox Scotty pocket watch,
featuring a white, shock-resistant dial and a manual wind mechanical movement with a subsidiary seconds dial.
Here are its key details:
Brand: Westclox
Model: Scotty
Era: Likely mid-20th century (1950s-1960s) manufactured in the USA.
Features: Shock Resistant, clear Arabic dial, and one of the company's most widely produced watches.