This watch is a classic “gentleman’s watch” with an unspecified production date. The series number refers to the case diameter, used to standardize components like the crystal and stem, rather than indicating a specific model. Watches in the same series case could feature various movements, dials, and handsets. Without a distinct name on the dial (e.g., Sky Chief, Sea Lord, etc.), the marketing name was typically only found in catalog listings, on the outer cardboard sales box label, or on a hang tag.
