November 1976 Seiko Bullhead Chronograph Automatic, series 6138-0040 in near mint condition, in the favoured blue / black colouration.
All functions working perfectly, keeping perfect time. Presents very well with an un-marked bezel insert and new-condition period-correct fishbone style Seiko strap.
The case, in original condition, has the correct mixture of matte-finished and highly polished surfaces.