OMEGA limited Speedmaster 60th Anniversary chronograph, manual winding, reference 31110393001001, launched to honor the 60th anniversary of the 1957 launched model, stainless steel case including bracelet with deployant clasp, screwed down case back with Speedmaster logo, black contrast dial with tropical effect, display of hours, minutes, constant second & chronograph, 18 jewels, calibre 861 with glucydur-balance, diameter 38,6 mm, length approx. 22 cm, original box with additional original leather strap, Nato- strap, changing tool & papers, sold in April 2018, condition 1-2