One of the perfect sample of Seiko 6139 series: Seiko 6139-6012. It has rare beautiful saxe blue color dial. Movement: cal. 6139B Japan - 17 Jewels Instructions: Upper button starts and stops chronometer second and lower button reset it after stopping. Pushing crown sets the date and pushing harder sets both of day and date quickly. Material: All Steel Case-Size: 39.1mm (without crown), Lug-to-Lug: 43.2mm Band-Size: Fits up to approx. 20cm (wrist size), Lug: 19mm Service: The watch was recently controlled by an experienced watchmaker before the auction. Condition: Mint. Unnoticeable minor wear on case. Clean dial except for a few tiny hard-to-see tiny marks. Fully functional. Water-resistant NOT tested. Please look at pictures carefully. Accessories: Perfect matched aftermarket (OEM) stainless-steel bracelet band in the pictures. No box and paper. It will be sent as very-well packaged via Express Courier (DHL, UPS or TNT) with the tracking code. *Delivery Times: Europe: 2-5 BD, America: 3-8 BD, Other Countries: 3-10 BD *(BD: Business Days. Delivery times are estimated and may differ (esp. in holiday seasons) because of conditions that out of our control. Customs duties are buyer's responsibility.) Thank you for bidding. Please also see my other auctions. Good luck.