Jay O. Sanders wears an unidentified watch

Jay O. Sanders wears a steel watch as Lou Ivon in JFK (1991). Sighting down a scoped bolt-action rifle, he has a round steel watch on a flexible stretch bracelet at his left wrist, a period-correct early-1960s look. The dial catches the light but won't give up any branding, so I can't name it. Recognise it, or want to guess? Leave it in the comments.