Seiko 6138 ‘UFO’ chrono

Another big 1970s watch: a Seiko 6138-0011 ‘UFO’ automatic chronograph from 1976. The face is a little worn — especially around the chrono subdials — but the case, hands, bezel and crystal are in great shape; it goes and goes and keeps excellent time; and the red-and-black perforated leather strap I found is a perfect match.