Description
Classic design: Applied hour markers, three hands and a traditional round case.
Japanese origin: The case-back markings appear to indicate Japanese manufacture.
2. Model and manufacturing details
The case-back markings appear consistent with the Citizen reference GN-4W-S. A matching Pakistani vintage-watch listing identifies this reference as a Japanese 21-jewel automatic day-date watch.
Estimated age: possibly 1970s–1980s.
Movement: likely from Citizen's vintage automatic family.
The exact movement calibre is not confirmed from your photographs.
Water resistance: the case-back marking says Water Resist, but this does not guarantee that it remains waterproof today.