OMEGA Speedmaster Moonwatch Professional Master Chronometer Chronograph Manual Winding 310.30.42.50.01.001. There are minor scratches from use, so please consider this before purchasing. The crystal is Hesalite (reinforced plastic). The included straps are the original bracelet and a Forstner "Komfit" style bracelet. *Please note that the leather strap in the image is not included. ref. 310.30.42.50.01.001 Serial: 829※※※※※ cal. 3861 Manual Winding Warranty card date: 2021.7.20 Size: *Measured with calipers Width: 42mm (excluding the crown) Length: 47.2mm (lug to lug) Thickness: 13.9mm Lug width: 20mm Accessories: Warranty card, Master Chronometer certificate card, Pictogram card, booklets, inner box, outer box, spare links (6 links, approx. 5mm each) *Currently adjusted for a wrist size of approximately 17cm, allowing for an additional 3cm extension. Also included: Forstner "Komfit" style bracelet (currently adjusted to 14cm) and spare links (8 links, approx. 5mm each).