FEATURES Chronograph 24 hours Tachymeter Day-Date Small seconds TECHNICAL DATA Between Lugs: 18 mm Bracelet: steel Case: Steel Case Diameter: 39 mm Dial colour: Black Crystal: Scratch-resistant sapphire crystal with anti-reflective treatment inside Water resistance: 5 bar (50 metres / 167 feet) MOVEMENT Calibre: Omega 1151 Self-winding chronograph movement with rhodium-plated finish. Power reserve: 44 hours Type: Self winding Aesthetic Condition*: Practically no signs of use on the case and bracelet. Only minor degradation of the AR, which is unusually good for this model. Looks very close to new on your wrist. - We consider this watch, as shown in the pictures, as Near Mint to Mint Extras: see pictures This watch may also qualify for a FREE Watchfacts Digital Certificate of Authenticity** In-House Test Results***: Bench-run for at least 24 hours. All watch functions tested and operable. Observed rate: performs per manufacturer specs Bracelet Sizing: up to 6.75 inches Serial: 57415XXX Service History: Unknown *Photos are of the actual watch, are part of the description, and are taken to exceed mid-luxury inspection standards, including Omega and Rolex. Grades are the listing text and pictures summarized into a simple-to-understand score, not to be confused with TZ or other grading systems. ** Most modern models from major brands will qualify. Certificate transferable to future owners. Watchfacts is the leading authenticator of fine watches in the USA. ***Instantaneous measurements using a timegrapher averaged over 6 positions. Use only as a baseline. Your wearing habits will affect results. Unserviced watches are not tested for WR or PR. Bracelet size measured using a ruler or mandrel. A comfortable bracelet size may vary from your measured wrist size. No explicit or implied warranties. Make/Brand: Omega Model: Speedmaster Day Date Mark 40 Chronograph Reference: 3520.50 Movement: Auto Case Material: stainless steel Gender: Unisex Case Diameter: 39mm Case Dial Color: Black Condition (C24 Scale): mint Year: 1999 With Box?: N With Papers?: N New?: N Negotiable?: Y Interactive 360 degree views, and additional information on this watch is available on our website Why Buy From Us? - Watch Vault NYC is your first choice for Omegas! Because we focus on a single brand, we are one of the most knowledgeable sellers of pre-owned Omega watches in the USA. Millions of $$$ in Omega sales annually! - Buy from a trusted seller! We sponsor the worlds largest watch communities. Tens of thousands of combined followers on FB and Instagram - Watches ship from the USA from our secure vault facility. Fast, simple, and no customs duty to pay for US buyers vs buying from abroad. Whats the Deal With the Watchfacts Certificate? Due to Ebays new FREE authentication service, we are discontinuing the issuance of the now redundant Watchfacts authenticity certificates. Common Sense Notices and disclaimers: These are pretty basic and should go without saying, but will be stated anyway to avoid any misunderstanding: 1) We photograph and inspect our photos from 6 inches away, using 5500K lighting at 2000 lumens. This far, far exceeds the standards Omega and other mid-luxury brands use to inspect brand new watches. Therefore: - You will take into consideration that your monitor settings, and the lighting you use when you inspect this watch may affect your perception of colors.  - Imperfections visible in the pictures are of course considered FULLY disclosed even if they are not described in the listing text - Imperfections too small to be seen in the provided pictures may of course exist. However, since our lighting and inspection standards already significantly exceeds those required for inspecting new Omega watches, any flaws not visible in the pictures especially those taken under any magnification or special lighting, are by definition considered insignificant. - The grades we give our watches are not the same as, and should not be confused with watch grading systems like Timezone, Chrono24, etc. 2) We make a good faith attempt to accurately assess the mechanical condition of the watches we sell. That said: - You agree that these watches are sold without warranty. By definition - timekeeping, water resistance and power reserve cannot be guaranteed even if they test perfectly on our end.  - You agree that servicing is a normal, expected, and routine part of ownership, without which a watch may perform less than optimally over time. You agree that poor timekeeping or power reserve, moisture intrusion during ownership, rough crown or bezel operation, sticky pushers, delayed or advanced date changes, rotor noise are not defects or damage - they are normal signs of a used watch that may benefit from a service. You of course agree that maintaining any watch you buy from us is always at your expense. 3) Ebay shipping estimates are ESTIMATES. These are not guaranteed delivery dates. When you buy watches from us, you have read and agree to these common sense notices and disclaimers Ebay Policies You Should Keep in Mind: We only ship to your registered delivery address and require an adult signature during delivery. You do not have the ability to change the delivery address post purchase. Please plan ahead. ITEMS MUST BE RETURNED UNUSED on order to qualify for a full refund of the item price. Tamper seals must be intact, the watch must not be resized or show any signs of wear or damage by the buyer, the case must not be opened, and all accessories must be returned complete and unused. Items that show signs of use must go through our re-inspection and if necessary refurbishment process to ensure quality, the costs of which will be solely determined by us and debited from your refund International buyers pay for return shipping. Taxes, duty and related fees are paid to and refunded from your government.  Per Ebay rules we do not solicit nor do we give out outside contact information. If you contact us here, we are obligated to complete the sale here