{"product_id":"vintage-omega-constellation-calendar-two-tone-dial-english-18k-gold-case-caliber-504-from-1958","title":"Vintage Omega Constellation Calendar, Two-tone dial, English 18K Gold Case, Caliber 504, from 1958","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eThis 1958 Omega Constellation Calendar represents one of the most respected references in vintage Swiss watchmaking - the first Constellation to be fitted with a date function, and a model that outclassed its contemporaries in both finishing and movement quality. The 35mm case is solid 18K gold, hallmarked and made by Dennison in England for Omega, with the recognizable lyre-style lugs and Constellation observatory medallion on the caseback. At approximately 50g, it carries genuine weight on the wrist, a hallmark of these solid gold Constellation cases.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eThe dial is a clean silver two-tone design with applied baton indices, a double baton marker at 12, and dauphine hands. The \"Automatic Chronometer Officially Certified\" signature and the star above \"Constellation Calendar\" confirm the chronometer-grade specification of this reference. A date window sits at 3 o'clock, framed cleanly within the dial layout.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eInside is the Omega Caliber 504, a 24-jewel automatic chronometer movement and one of only 25,000 ever produced - among the most highly regarded calibers Omega made during this period, prized today by collectors of vintage Swiss automatic watches. The watch has been inspected by our watchmaker, runs as expected, and comes with a one-year warranty. It will be carefully packed and shipped via express insured delivery, ready to wear on arrival.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eCASE:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e18K solid gold case, hallmarked, by Dennison (Made in England) for Omega\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eConstellation reference 2943\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eCase diameter: 35mm (44mm lug-to-lug)\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eThickness: 12mm, lug width: 18mm\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eWeight: 50g\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eConstellation observatory medallion on caseback\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eSerial number 16881551, dating production to 1958\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eDIAL:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eSilver dial with applied baton indices\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eDouble baton marker at 12 o'clock\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eDauphine-style gold hands\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\"OMEGA Automatic Chronometer Officially Certified\" signature\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\"Constellation Calendar\" signature with star\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eDate window at 3 o'clock\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eMOVEMENT:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eOmega Caliber 504, automatic chronometer\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e24 jewels\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eLimited production of approximately 25,000 units\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eSwiss made\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eCurrently running and functioning as expected\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"DuMarko","offers":[{"title":"Default Title","offer_id":49201795858684,"sku":null,"price":8200.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0601\/2266\/1116\/files\/5H9A18102.jpg?v=1781521905","url":"https:\/\/dumarko.com\/de\/products\/vintage-omega-constellation-calendar-two-tone-dial-english-18k-gold-case-caliber-504-from-1958","provider":"DuMarko","version":"1.0","type":"link"}