{"product_id":"rolex-datejust-31-31-mm-278240bkrj","title":"Rolex Datejust 31 31 mm 278240BKRJ Steel Black","description":"\u003cp\u003eThe Rolex Datejust 31 reference 278240BKRJ is a brand-new 31mm stainless steel watch featuring a striking black dial, stainless steel domed bezel, and Rolex's iconic Jubilee bracelet. It is powered by an automatic movement and rated to 100 meters (330 feet) of water resistance, making it a thoroughly capable everyday timepiece.\u003c\/p\u003e\n\u003cp\u003eReference 278240BKRJ sits at the heart of the Datejust family, balancing a refined 31mm case size with the timeless elegance of the black dial and Jubilee bracelet combination — one of the most sought-after configurations in the line. Contact Bizak \u0026amp; Co. today to purchase this certified authentic Rolex Datejust 31 online.\u003c\/p\u003e\n\u003cp\u003eCompare it across \u003ca href=\"\/collections\/rolex-datejust-31\"\u003eevery Datejust 31 reference we carry\u003c\/a\u003e, or browse the full \u003ca href=\"\/collections\/rolex\"\u003eRolex collection\u003c\/a\u003e at Bizak \u0026amp; Co.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBuy this Datejust 31, trade in your current watch, or sell us yours.\u003c\/strong\u003e Contact Bizak \u0026amp; Co. to make an offer or request a fair-market valuation.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What makes the Rolex Datejust 31 reference 278240BKRJ special?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The 278240BKRJ pairs a bold black dial with a classic stainless steel domed bezel and the iconic Jubilee bracelet in a versatile 31mm Oystersteel case. This combination is one of the most sought-after Datejust configurations, offering timeless elegance and strong long-term desirability. It is offered here as a certified authentic, brand-new example.\"}},{\"@type\":\"Question\",\"name\":\"What movement powers the Rolex Datejust 31 278240BKRJ?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The Datejust 31 ref. 278240BKRJ is fitted with a Rolex automatic movement, providing self-winding convenience driven by natural wrist motion. Rolex's automatic movements are renowned for their reliability, precision, and chronometric performance. Specific caliber details for this reference should be confirmed with Bizak \u0026 Co. or Rolex directly.\"}},{\"@type\":\"Question\",\"name\":\"What is the case size of the Rolex Datejust 31 ref. 278240BKRJ?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"As the model name indicates, this Datejust features a 31mm case diameter crafted from stainless steel (Oystersteel). The 31mm size is a versatile mid-size format suited to a wide range of wrist sizes. The case carries a 100-meter (330-foot) water resistance rating.\"}},{\"@type\":\"Question\",\"name\":\"Is the Rolex Datejust 31 278240BKRJ suitable for everyday wear?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes — the Datejust 31 is purpose-built for daily wear, combining a durable Oystersteel Oyster case, screw-down crown, and 100-meter water resistance with the practicality of an automatic movement. The Jubilee bracelet is exceptionally comfortable for extended wear throughout the day. Its refined proportions and black dial make it equally appropriate for professional and casual settings.\"}},{\"@type\":\"Question\",\"name\":\"What are the dial and bracelet details of the 278240BKRJ?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The dial is black, offering high-contrast legibility and a contemporary yet classic appearance. The watch is fitted with Rolex's celebrated five-piece-link Jubilee bracelet in Oystersteel, paired with a stainless steel domed bezel. Together these elements create one of the most iconic and balanced Datejust aesthetic combinations available.\"}},{\"@type\":\"Question\",\"name\":\"Is the Rolex Datejust 31 278240BKRJ a good buy, and how can I purchase it from Bizak \u0026 Co.?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The Datejust 31 in this black-dial, Jubilee-bracelet configuration is widely regarded as a cornerstone Rolex reference with strong and consistent collector demand. Bizak \u0026 Co. offers this certified authentic, brand-new example for sale online at bizakandco.com. You can purchase directly through the site or contact the Bizak \u0026 Co. team for assistance with your order.\"}}]}\u003c\/script\u003e","brand":"Rolex","offers":[{"title":"Default Title","offer_id":48860257747179,"sku":"278240BKRJ","price":8834.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0758\/8688\/7147\/files\/278240BKRJ_d6974e20-f511-460b-b231-a4040d19b594.jpg?v=1781360382","url":"https:\/\/bizakandco.com\/products\/rolex-datejust-31-31-mm-278240bkrj","provider":"Bizak \u0026 Co.","version":"1.0","type":"link"}