Tested and Working, Seiko 6138-0030 Automatic Chronograph.  Also known as the Kakume because of the square sub dials.  Serviced in the last year and running strong.  Cosmetically in good, used condition as seen in the pictures.  Very cool to wear.   Winds easy.  All original I believe but let the pictures tell the story.  Resets to zero as seen in the last  picture.  Quickset for date and day is working.  Comes on a new Barton Rally Leather strap that pairs well with the look.  Awesome watch.  

From my research, it is best to let the chronograph hand run to protect the chronograph wheel.