{"product_id":"rolex-op-3131-bubbleback-18k-gold-31mm-chronometre-white-arabic-dial-watch","title":"Rolex OP 3131 Bubbleback 18K Gold 31mm Chronometre White Arabic Dial Watch","description":"\u003cdiv\u003eVintage Rolex Oyster Perpetual Bubbleback reference 3131 features a white dial with applied gold Arabic numerals, blue dauphine hands, and \"Chronometre\" designation, housed in an 18K yellow gold case with domed Bubbleback case back. Aftermarket Steelinox stainless steel bracelet.\u003c\/div\u003e\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\u003cdiv\u003eAutomatic, 31mm, circa 1946, 73.76 grams total, 7.5-inch bracelet, 9\/10 condition.\u003c\/div\u003e\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cstrong\u003eProduct Specifications:\u003c\/strong\u003e\u003c\/div\u003e\u003cul\u003e\n\u003cli\u003eItem Type: Vintage Luxury Automatic Wristwatch\u003c\/li\u003e\n\u003cli\u003eBrand: Rolex\u003c\/li\u003e\n\u003cli\u003eModel: Oyster Perpetual Bubbleback\u003c\/li\u003e\n\u003cli\u003eReference: 3131\u003c\/li\u003e\n\u003cli\u003eCase Material: 18K yellow gold\u003c\/li\u003e\n\u003cli\u003eCase Size: 31mm\u003c\/li\u003e\n\u003cli\u003eCase Back: Domed \"Bubbleback\" — characteristic high-profile automatic rotor housing\u003c\/li\u003e\n\u003cli\u003eMovement: Automatic (Bubbleback rotor)\u003c\/li\u003e\n\u003cli\u003eBracelet: Aftermarket Steelinox stainless steel bracelet\u003c\/li\u003e\n\u003cli\u003eBracelet Length: 7.5 inches\u003c\/li\u003e\n\u003cli\u003eTotal Weight: 73.76 grams\u003c\/li\u003e\n\u003cli\u003eCondition: 9\/10\u003c\/li\u003e\n\u003cli\u003eCirca: 1946\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cstrong\u003eDial and Hands:\u003c\/strong\u003e\u003c\/div\u003e\u003cul\u003e\n\u003cli\u003eDial: White — clean white ground with fine chapter ring and minute track\u003c\/li\u003e\n\u003cli\u003eIndices: Applied gold Arabic numerals (12, 2, 4, 6, 8, 10) with gold baton at remaining positions\u003c\/li\u003e\n\u003cli\u003eHands: Blue dauphine-style hands — characteristic of high-quality Rolex period movements\u003c\/li\u003e\n\u003cli\u003eChronometre designation printed on lower dial\u003c\/li\u003e\n\u003cli\u003eDial Text: Rolex \/ Oyster Perpetual \/ Chronometre \/ Swiss Made\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cstrong\u003eBezel Type and Details:\u003c\/strong\u003e\u003c\/div\u003e\u003cul\u003e\n\u003cli\u003eBezel Type: Fixed, smooth polished round\u003c\/li\u003e\n\u003cli\u003eBezel Material: 18K yellow gold\u003c\/li\u003e\n\u003cli\u003eStyle: Classic Bubbleback round smooth gold bezel\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cstrong\u003eBand Details:\u003c\/strong\u003e\u003c\/div\u003e\u003cul\u003e\n\u003cli\u003eBand Material: Stainless steel (Steelinox — period-style aftermarket)\u003c\/li\u003e\n\u003cli\u003eBand Style: Integrated rice-grain \/ ball link bracelet\u003c\/li\u003e\n\u003cli\u003eBand Color: Stainless steel \/ silver-tone\u003c\/li\u003e\n\u003cli\u003eBand Length: 7.5 inches\u003c\/li\u003e\n\u003cli\u003eNote: Aftermarket Steelinox bracelet — not original Rolex bracelet\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cstrong\u003eFeatures and Style:\u003c\/strong\u003e\u003c\/div\u003e\u003cul\u003e\n\u003cli\u003eChronometre certified — highest accuracy standard of the era\u003c\/li\u003e\n\u003cli\u003eAutomatic self-winding Bubbleback rotor movement\u003c\/li\u003e\n\u003cli\u003eBlue dauphine hands — period-specific luxury detail\u003c\/li\u003e\n\u003cli\u003eDomed case back — the defining feature of the Bubbleback family\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cstrong\u003eAbout Rolex Bubbleback Ref. 3131:\u003c\/strong\u003e\u003c\/div\u003e\u003cdiv\u003eThe Rolex Bubbleback is one of the most historically significant and beloved vintage Rolex families ever produced, the first generation of Rolex's self-winding Oyster Perpetual watches, introduced in the 1930s and produced through the late 1940s, named for the distinctive dome-shaped case back that accommodated the larger early Perpetual rotor mechanism before miniaturization allowed the flat case back of later references. Reference 3131, produced in the mid-1940s, represents the Bubbleback at its most refined, the full-sized automatic movement in an 18K yellow gold case, with the Chronometre designation on the dial confirming that the movement passed the stringent precision testing of the era. The white dial with gold Arabic numerals and blue steel hands is one of the most sought-after and visually distinctive Bubbleback dial configurations, the blue hands providing an elegant contrast against the white ground that reads as both instantly legible and beautiful. A circa 1946 Bubbleback in 18K gold with a 9\/10 condition presentation and a documented 73.76-gram total weight represents a genuinely remarkable survival of one of the most important chapters in Rolex's history. For the serious vintage Rolex collector, no reference carries more historical weight than the Bubbleback, the watch that proved automatic winding was commercially viable and set the trajectory for every self-winding Rolex that followed.\u003c\/div\u003e","brand":"ASSAY","offers":[{"title":"Default Title","offer_id":48305050550462,"sku":"3037","price":144441.0,"currency_code":"NOK","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0508\/5724\/6910\/files\/Rolex-OP-3131-Bubbleback-18K-Gold-31mm-Chronometre-White-Arabic-Dial-Watch-Watch.jpg?v=1785687537","url":"https:\/\/assayjewelers.com\/it-no\/products\/rolex-op-3131-bubbleback-18k-gold-31mm-chronometre-white-arabic-dial-watch","provider":"ASSAY","version":"1.0","type":"link"}