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 Note : new chronograph red hands ... Service: The watch was recently controlled by an experienced watchmaker before the auction. Condition: Mint. 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(seiko) band in the pictures. No box and paper. *(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.)