Certina, Calibre 321, 15 jewels, Swiss made, metal case, small second hand at the 6. Lid case number 81101, 3051480 with inner lid. Watch probably dates from before 1958. Diameter without crown 34 mm, crown was replaced. New leather strap, length 19 cm, lug width 18 mm. Case has normal signs of wear, dial with patina and lid quite worn but good. Watch runs well. Beautiful, clean movement. Tested for a week. Service history is unknown to me, and servicing is recommended. Please see the photos to form your own assessment. Comes without accessories. Registered and insured shipping. Good luck bidding!