We have here a beautiful and interesting special design, an automatic chronograph wristwatch with quick return, called "Bullhead", Citizen model. The wristwatch was manufactured by: Citizen Watch Co. Japan, around the 1970s. The model is as follows: Citizen Chronograph Automatic, also known as "Bullhead" and "Challenge Timer". The movement is the 8110A calibre with 23 jewels, with the possibility of manual winding. Black round for date and day, black internal tachometric ring, (slightly damaged, see photos), case numbers between 4-901053 Y and 41001137, 67-9011 Composition of the case: Stainless steel (metal case, black lunette) and stainless steel case back and strap. The width of the case is 35 mm, the length is 46 mm (including crowns), and the thickness of the case is 11 mm. The watch is in very good condition, as shown in the pictures. All original The watch has been fully examined. The mechanism works correctly. The reset must be looked at, a small adjustment is required. Registered and secure shipping by post, with tracking and signature upon receipt. Shipping costs payable by the buyer.