zSOLD 1976 SEIKO 6138-0040 BULLHEAD Chronograph Watch Sold. Thanks BeN! ALL Original and COMPLETELY UNmodified Vintage Seiko BULLHEAD Chronograph watch. Perfect working order! Service history is unknown. Straight from original owners home. Comes with correct fishbone bracelet original to watch! Case and bracelet exhibit surface wear. Edges sharp, never polished. Dial is excellent. Mouse over images to enlarge image to the right